2412 results about "Hot isostatic pressing" patented technology

An electrical-energy-storage unit (EESU) has as a basis material a high-permittivity composition-modified barium titanate ceramic powder. This powder is double coated with the first coating being aluminum oxide and the second coating calcium magnesium aluminosilicate glass. The components of the EESU are manufactured with the use of classical ceramic fabrication techniques which include screen printing alternating multilayers of nickel electrodes and high-permittivitiy composition-modified barium titanate powder, sintering to a closed-pore porous body, followed by hot-isostatic pressing to a void-free body. The components are configured into a multilayer array with the use of a solder-bump technique as the enabling technology so as to provide a parallel configuration of components that has the capability to store electrical energy in the range of 52 kW·h. The total weight of an EESU with this range of electrical energy storage is about 336 pounds.

The lightweight bulletproof metal matrix macrocomposites (MMMC) contain (a) 10-99 vol. % of permeable skeleton structure of titanium, titanium aluminide, Ti-based alloys, and / or mixtures thereof infiltrated with low-melting metal selected from Al, Mg, or their alloys, and (b) 1-90 vol. % of ceramic and / or metal inserts positioned within said skeleton, whereby a normal projection area of each of said inserts is equal to or larger than the cross-section area of a bullet or a projectile body. The MMMC are manufactured as flat or solid-shaped, double-layer, or multi-layer articles containing the same inserts or different inserts in each layer, whereby insert projections of each layer cover spaces between inserts of the underlying layer. The infiltrated metal contains 1-70 wt. % of Al and Mg in the balance, optionally, alloyed with Ti, Si, Zr, Nb, V, as well as with 0-3 wt. % of TiB2, SiC, or Si3N4 sub-micron powders, to promote infiltrating and wetting by Al-containing alloys. The manufacture includes (a) forming the permeable metal powder and inserts into the skeleton-structured preform by positioning inserts in the powder followed by loose sintering in vacuum to provide the average porosity of 20-70%, (b) heating and infiltrating the porous preform with molten infiltrating metal for 10-40 min at 450-750° C., (c) hot isostatic pressing of the infiltrated composite, and (d) re-sintering or diffusion annealing.

To protect the collimator of a transferred plasma arc torch from premature failure due to corrosion, an anti-corrosive covering is applied on the exposed face surface and a portion of the inner exit bore of the collimator. The specification describes several methods for producing the collimator for a plasma torch having an anti-corrosive coating or cladding on the exposed surfaces thereof, including electroplating, electroless plating, flame spraying, plasma spraying, plasma transferred arc, hot isostatic pressing and explosive cladding.

Polycrystalline gallium nitride (GaN) characterized by having the atomic fraction of gallium ranging from between about 49% to 55%, an apparent density of between about 5.5 and 6.1 g / cm3, and a Vickers hardness of above about 1 GPa. Polycrystalline GaN can be made by hot isostatic pressing (HIPing) at a temperature ranging from about 1150° C. to 1300° C. and a pressure ranging from between about 1 and 10 Kbar. Alternatively, polycrystalline GaN can be made by high pressure / high temperature (HP / HT) sintering at a temperature ranging from about 1200° to 1800° C. and a pressure ranging from about 5 to 80 Kbar.

Novel methods of making laminated, microchannel devices are described. Examples include: assembly from thin strips rather than sheets; and hot isostatic pressing (HIPing) to form devices with a hermetically sealed wall. Laminated microchannel articles having novel features are also described. The invention includes processes conducted using any of the articles described.

A method for repairing a titanium alloy surface of a turbine component includes the step of cold gas-dynamic spraying a powder material comprising at least one titanium alloy directly on the titanium alloy surface. The method may further include the steps of hot isostatic pressing the cold gas-dynamic sprayed turbine component, and performing a separate heat treating step after the hot isostatic pressing. Thus, the cold gas-dynamic spray process and post-spray processing can be employed to effectively repair degraded areas on compressor turbine components.

An electrical-energy-storage unit (EESU) has as a basis material a high-permittivity composition-modified barium titanate ceramic powder. This powder is single coated with aluminum oxide and then immersed in a matrix of poly(ethylene terephthalate) (PET) plastic for use in screen-printing systems. The ink that is used to process the powders via screen-printing is based on a nitrocellulose resin that provide a binder burnout, sintering, and hot isostatic pressing temperatures that are allowed by the PET plastic. These lower temperatures that are in the range of 40° C. to 150° C. also allows aluminum powder to be used for the electrode material. The components of the EESU are manufactured with the use of conventional ceramic and plastic fabrication techniques which include screen printing alternating multilayers of aluminum electrodes and high-permittivity composition-modified barium titanate powder, sintering to a closed-pore porous body, followed by hot-isostatic pressing to a void-free body. The 31,351 components are configured into a multilayer array with the use of a solder-bump technique as the enabling technology so as to provide a parallel configuration of components that has the capability to store at least 52.22 kW·h of electrical energy. The total weight of an EESU with this amount of electrical energy storage is 281.56 pounds including the box, connectors, and associated hardware.

The invention provides a high-abrasion Ti(C, N) based metal ceramic tool and a preparation thereof. The Ti(C, N) based metal ceramic tool uses Ni and Co as a binder phase, is added with at least one carbonitride of Ti(Cx, N1-x) or (TiC)x plus (TiN)1-x as a basic batch, and consists of at least one composition of WC, Mo2C, Co, Ni, ZrC, Cr3C2, VC, TaC and NbC, and the balance being Ti(Cx, N1-x) or (TiC)x plus (TiN)1-x, wherein, an X value for adding the carbonitride of the Ti(C, N) based metal ceramic tool is as follows: X is less than or equal to 0.5 and more than or equal to 0.4, or the X is more than 0.5 and less than or equal to 0.7. The Ti(C, N) based metal ceramic tool is prepared according to the content of nitrogen by nitrogen pressure sintering or vacuum sintering combined with hot isostatic pressing treatment, thereby preventing nitrogen from escaping during the process of sintering high-nitrogen alloy, so that the high-nitrogen-carbon ratio in matrix and material hardness can be reliably guaranteed, and anti-oxidative abrasion property and anti-diffusive abrasion property of the material can be obviously increased through adding slight ZrC, Cr3C2, VC and other carbides into the basic batch; meanwhile, compactability and buckling strength of a low-nitrogen alloy structure can be obviously improved through optimally distributing each composition and content. The Ti(C, N) based metal ceramic tool is widely suitable for high-speed cutting tools of medium-low carbon steel and low alloy steel.

A wear part (5) for detachable mounting on a supporting part in an impact-type multi-action crusher is at least partly manufactured by hot isostatic pressing. The wear part (5) has a body (19) for mounting of the wear part (5) on the supporting part and a crushing layer (20) which is attached to the body (19) and which is adapted to be brought, during operation of the crusher, into repeated contact with a raw material that is to be crushed. The body (19) is made of a substance which is easy to machine to narrow tolerances, and the crushing layer (20) is made of a material (27, 28) of high abrasive resistance. In a method of manufacturing the above wear part (5), the following steps are carried out: introducing at least one powder material (27, 28) into a capsule, degassing and sealing the capsule, subjecting the material (27, 28) in the capsule to hot isostatic pressing to form a crushing layer (20), and then after treatment of the wear part (5).

Spent sputtering targets are refurbished by filling the depleted region of the target with new sputter material using a hot isostatic pressing or HIP'ing technique.

(Problem)In conventional method for producing artificial graphite, in order to obtain a product having excellent crystallinity, it was necessary to mold a filler and a binder and then repeat impregnation, carbonization and graphitization, and since carbonization and graphitization proceeded by a solid phase reaction, a period of time of as long as 2 to 3 months was required for the production and cost was high and further, a large size structure in the shape of column and cylinder could not be produced. In addition, nanocarbon materials such as carbon nanotube, carbon nanofiber and carbon nanohorn could not be produced.(Means to Solve)A properly pre-baked filler is sealed in a graphite vessel and is subsequently subjected to hot isostatic pressing (HIP) treatment, thereby allowing gases such as hydrocarbon and hydrogen to be generated from the filler and precipitating vapor-phase-grown graphite around and inside the filler using the generated gases as a source material, and thereby, an integrated structure of carbide of the filler and the vapor-phase-grown graphite is produced. In addition, nanocarbon materials are produced selectively and efficiently by adding a catalyst or adjusting the HIP treating temperature.

An aluminum alloy cast product is composed of: Cu5.00-6.75weight %,Mg0.05-0.50weight %,Mn0.05-0.65weight %,Ti0.05-0.40weight %,Ag0.00-0.40weight %,Cr0.00-0.20weight %,V0.00-0.40weight %,Zr0.00-0.30weight %,Fe<0.15weight %,Si<0.15weight %,Ni<0.05weight %,Zn<0.05weight %,impurities<0.05each weight %,<0.25total weight %,AlbalanceSuch an aluminum alloy cast product is heat treated to eliminate the interdendritic network of second phase particles. The heat treatment of such an aluminum alloy casting alloy includes solution heat treatment before hot isostatic pressing.

The invention belongs to the technical field of material processing, and particularly relates to a molybdenum alloy target preparation method. Alloy powder is formed by molybdenum powder and other metal powder in a mechanical alloying mode, the alloy powder is processed, and a molybdenum alloy target is obtained. The mechanical alloying process is adopted, so that distribution uniformity and alloying performance of the powder raw materials are better; hot isostatic pressing is conducted after cold isostatic pressing, so that the compactness of the molybdenum alloy target is better; through the multi-stage degassing process, the oxygen content of the molybdenum alloy target is lower, and the degassing performance is better.

A technology for manufacturing a part by proximal forming method includes such steps as inputting the 3D model of a part to a fast SLM or SLS machine, vacuumizing the shaping chamber of SLM or SLS machine, using laser to scan the metal powder outside the boundary for smelting it, scan the metal powder inside the boundary to form mesh structure, forming a compact shell sealed part, and HIP processing.

The invention provides a ceramic composite material for a thin-strip casting side sealing plate and a preparation method thereof, relating to a ceramic composite material and a preparation method thereof and solving the problems that the traditional side sealing plate has high heat conductivity, serious abrasion, poor seal, high preparation cost and large energy consumption, can not be secondarily processed or reused. The ceramic composite material consists of zirconia, boron nitride and additives. The preparation method comprises the following steps: 1, weighing raw materials; 2, ball milling and mixing the raw materials; 3, drying to obtain uniform mixed powder; and 4, carrying out hot pressed sintering, pressureless sintering, air pressure sintering or hot isostatic pressed sintering on the mixed powder, so as to obtain the ceramic composite material for a thin-strip casting side sealing plate. The compactness of the ceramic composite material is 94%-99%, the bending strength of the ceramic composite material, tested by a three-point bending test at room temperature, is 260-420MPa, and the fracture toughness of the ceramic composite material, tested by a unilateral coped beam method, is 3-8 MPa.m<1 / 2>. The ceramic composite material can be widely applied to the field of side sealing plate materials.

The object of the invention is to make available implant elements or other medical products made of biological material with optimum mechanical and biological properties for a wide group of materials by introduction of a specially designed surface layer onto a strong core, where the surface layer is densified by means of hot isostatic pressing and dimensioned according to the basic fracture mechanics equation so that the thickness of the surface layer is less than c in the equation KIC=Ysigma c½, where Klc is the fracture toughness, Y a position and shape factor, c the critical defect size, and sigma the permitted stress for the actual material and the chosen design stress.

The invention belongs to the technical field of high-temperature alloy near net shape forming and discloses a method for preparing oxide dispersion strengthened alloy by rapid forming. The method includes: using the mechanical alloying process to obtain oxide dispersion strengthened alloy powder, using CAD (computer-aided design) software to design a three-dimensional solid model of an ODS (oxide dispersion strengthened) alloy part, subjecting the three-dimensional model to layering and slicing to disperse the three-dimensional model into a series of two-dimensional layers, smelting the ODS alloy powder layer by layer according to slicing information to obtain a laser rapidly formed blank in a needed shape, eliminating residue pores in the laser rapidly formed blank by means of hot isostatic pressing, and optimizing structure property by means of subsequent annealing or solid solution and aging heat treatment to obtain an ODS alloy part in a complex shape. Wrap packaging or fixture moulds are not needed, the complexity of shapes of parts is unlimited, and alloy components and structures are easy to control. The prepared ODS alloy is small in oxide dispersed phase, and products are high in compactness and excellent in comprehensive mechanical property.

The invention discloses an integral rapid manufacturing method of a hot isostatic pressing metal sheath, comprising the steps: (1) a CAD three-dimensional model of the metal sheath is designed by adopting three-dimensional molding software, and is then processed by slicing software and saved as an STL file, and the data information of the STL file is transmitted to an SLM rapid forming machine; (2) a forming chamber is vacuumized; (3) a metal powder layer is spread on a work platform flatly; (4) a semiconductor pumping YAG laser or a fiber laser is adopted to scan the metal powder positioned at the boundary of the slice layer, and the powder material at the boundary is melted; and (5) the step (3) and the step (4) are repeated until the compact sheath is manufactured. Powder inlet holes can be reserved on the sheath when designing the three-dimensional model of the sheath, so as to facilitate the subsequent processes such as powder filling, compaction by vibration, vacuum pumping and encapsulation. The sheath is compact and has a controllable shape, and can form parts with any complex shapes and structures, and can realize the high utilization rate of material.

A welding method of aluminum blank and aluminum alloy backboard comprises the following steps: providing an aluminum target blank and an aluminum alloy backboard; placing the aluminum target blank and the aluminum alloy backboard into a vacuum sheath and transferring into a welding device; adopting a hot isostatic pressing technique for diffusion welding, welding the aluminum target material blank to the aluminum alloy backboard for forming a target material assembly; and after the welding, executing air cooling and detaching the vacuum sheath and taking the target material assembly out. The invention adopts the vacuum sheath for realizing the isolation of target material from the backboard and the air. The oxidization on the surface of the metal in welding is effectively prevented and the cost of vacuum device is reduced. On the other hand, the hot isostatic pressing technique is used for the diffusion welding. The bonding strength between the aluminum target blank and the aluminum alloy backboard is effectively increased, and furthermore the bending deformation after bonding is little.

(a) The metal matrix composite is suitable for the manufacture of flat or shaped titanium aluminide, zirconium aluminide, or niobium aluminide articles and layered metal composites having improved mechanical properties such as lightweight plates and sheets for aircraft and automotive applications, thin cross-section vanes and airfoils, heat-sinking lightweight electronic substrates, bulletproof structures for vests, partition walls and doors, as well as sporting goods such as helmets, golf clubs, sole plates, crown plates, etc. The composite material consists of a metal (e.g., Ti, Zr, or Nb-based alloy) matrix at least partially intercalated with a three-dimensional skeletal metal aluminide structure, whereby ductility of the matrix metal is higher than that of the metal aluminide skeleton. The method for manufacturing includes the following steps: (a) providing an aluminum skeleton structure having open porosity of 50-95 vol. %, (b) filling said skeleton structure with the powder of a reactive matrix metal, (c) compacting the aluminum skeleton / matrix powder composite preform by cold rolling, cold die pressing, cold isostatic pressing, and / or hot rolling, (d) consolidating the initial or compacted composite preform by sintering, hot pressing, hot rolling, hot isostatic pressing, and / or hot extrusion to provide, at least partially, a reaction between aluminum skeleton and matrix metal powder, and (e) diffusion annealing followed by any type of heat treatment needed to provide predetermined mechanical and surface properties of the resulting metal matrix composite. The combination of ductile matrix and metal aluminide skeletal structure results in significant improvement of mechanical properties of the composite material, especially hot strength. This high-strength aluminide-based material can also be used as a core component in multilayer metal matrix composites.

The invention discloses an oxide dispersion strengthened low-activation martensitic steel. A substrate is a CLAM steel and contains 0.2 to 0.5 percent of Y2O3 and 0.10 to 0.50 percent of Ti. The method comprises the following steps that: CLAM steel powder, Y2O3 powder and Ti powder are evenly mixed and put in a sealed container for degassing, subjected to mechanical alloying, hot isostatic pressing or hot-pressing sintering and densification molding under the protection of high-purity argon gas, then subjected to hot squeezing or forging and rolling and other machining and molding processes, and the needed section material is prepared; and finally, the section material is subjected to the treatment of quenching and tempering to prepare the oxide dispersion strengthened low-activation martensitic steel ODS-CLAM. The oxide dispersion strengthened low-activation martensitic steel has the advantages that: the low-activation martensitic steel realizes a martensite-based alloy with oxide strengthening phases evenly dispersed and distributed and crystal grains of a reasonable size, can be used as a structural steel material, has the characteristics of strong neutron irradiation resistance, good high-temperature performance, low activation, etc. and is suitable for a fusion reactor and other environments with strong neutron irradiation and high-temperature.

The invention relates to a method for producing a molybdenum alloy sputtering target for a flat-panel display by using hot isostatic press. A target material green body is subjected to hydraulic pressure, isostatic cool press and hot isostatic press treatment with the pressure of 100-200 MPa; on the basis of increased density, the fine and uniform grain size can be obtained; and both the intensity and the toughness are increased. Under the co-action of high temperature and high pressure, a processed work piece is equally stressed in all directions; and the target has the characteristics of high density, good uniformity, excellent performance, short production period, less process, low energy consumption, low consumption of a post-processing material and the like.

The invention belongs to the preparing field of powder metallurgy, in particular to the powder metallurgy preparing method for titanium aluminum alloy target material. The components of the titanium aluminum alloy target material relates to: Ti to Al is equal to 80 percent to 20 percent or Ti to Al is equal to 20 to 80 percent. The powder metallurgy preparing method for the titanium aluminum alloy target material is to adopt a pulverization method to acquire the titanium aluminum alloy or mix the titanium powder and the aluminum powder and then pre-pressing through powder mounting and isostatic cool pressing, and then carries out hot isostatic pressing forming after the technique of desaeration and finally carries out sintering process and machining to acquire the titanium aluminum alloy target material. Compared with the exiting casting target material, the titanium aluminum alloy target material of the invention has the advantages of good compactness, no air holes, no loosening and aliquation, uniform component, petty crystal particle, big specification dimension, etc., and is suitable for hard coat needed by various tools and dies.

The invention discloses a manufacturing method of a large-calibre seamless titanium alloy barrel body, which comprises the steps of: 1, casting: casting titanium alloy raw materials into a large-calibre titanium alloy barrel blank by using a vacuum smelting furnace and through a vacuum smelting method; 2, hot isostatic pressing: performing the hot isostatic pressing for the large-bore titanium alloy barrel blank in an inert protective atmosphere by using a hot isostatic pressing device; 3, mechanical machining: processing a chamfer angle for spinning at the head of the large-bore titanium alloy barrel blank after the hot isostatic pressing by using mechanical processing equipment to obtain a spinning barrel blank; 4, spinning: thermally spinning the mechanically processed spinning barrel blank with the total deformation rate not less than 60% for many times by using spinning equipment to obtain a large-bore seamless titanium alloy thin-wall barrel body; and 5, subsequent treatment. The production process has short process flow, high yield, low cost, high utilization rate of materials and easy realization, and the defects of the large-bore seamless titanium alloy barrel body, such as complex process, high cost, low yield and the like of the traditional production process can be effectively solved.

The invention relates to a method for mill processing of a high-purity and high-density molybdenum alloy target and belongs to the technical field of colored target preparation. The method comprises the technical steps of powder mixing, briquetting, presintering and reduction, vacuum treatment, shaping, hot isostatic pressing jacket processing, jacket charge, jacket degassing, sealing weld, hot isostatic pressing treatment, rolling with a jacket, and finish product processing. Due to the rolling with the jacket, the method solves the problems that active metal components are difficult to reduce after oxidized during deformation processing of a molybdenum alloy containing active metal, so that the deformation processing cannot be performed. Compared with a processing method of cutting into thin blanks with a large-thickness blank line, the processing cost can be lowered greatly, the processing cycle can be shortened greatly, and the production efficiency is improved.

The method is suitable for the manufacture of flat or shaped titanium aluminide articles and layered metal matrix composites such as lightweight plates and sheets for aircraft and automotive applications, thin cross-section vanes and blades, composite electrodes, heat-sinking lightweight electronic substrates, bulletproof structures for vests, partition walls and doors, as well as for sporting goods such as helmets, golf clubs, sole plates, crown plates, etc. The method includes the following steps: (a) forming a porous preform of the reactive powder alloy or a porous multi-layer composite preform consisting of reactive powder metals and alloys by consolidation using at least one method selected from low-temperature loose sintering in vacuum, high-temperature loose sintering in vacuum, low-pressure sintering in an inert gas, cold pressing, direct powder rolling, isostatic or die pressing, and other means of room temperature and warm temperature consolidation, and / or combination thereof, to provide the density not less than 25% from the theoretical density of said reactive alloy; (b) hot consolidating by hot pressing said preform, hot rolling, hot isostatic pressing, or hot extrusion to obtain the density of 98-100% from the theoretical density of said reactive alloy; (c) additional sintering and / or annealing at the temperature being at least 900° C. to decrease the residual porosity, control the microstructure, and improve the mechanical properties, especially ductility and / or plasticity of the resulting metal sheets or layered composites. The hot pressing is carried out at the temperature ranging 950-1700° C., preferably at 1250-1450° C., and at pressure ranging 50-350 kg / cm<2>. The HIP is carried out at the temperature ranging 1250-1350° C. and at pressure ranging 15000-40000 psi. The layered composite preform is manufactured by individual loose sintering, one layer of the composite at a time, and assembling them in the desired order. The composite consists of layers of titanium and / or titanium hydride, Ti-6Al-4V alloy, alpha-titanium aluminide alloy, beta-titanium aluminide alloy, and gamma-titanium aluminide alloy in any combinations.

Disclosed is a method for preparing powder super-alloy by a near net shape. Firstly, high-purity intermediate alloy powder is prepared by the aid of vacuum melting and air jet pulverization technology. Secondly, the intermediate alloy powder and fine particle diameter metal powder (such as carbonyl nickel powder, carbonyl iron powder, reduction tungsten powder and reduction molybdenum powder) are mixed in a high-energy ball mill with protective atmosphere to obtain mixed powder. The mixed powder and paraffin base binders are uniformly premixed, feedstock with a uniform rheological performance is obtained by mixing and is formed on an injection forming machine to obtain a blank in a complicated shape. The binders are removed from the blank in the complicated shape by the aid of solvent degreasing and hot degreasing technologies, the degreased blank is sintered in the vacuum atmosphere, the sintered blank is further compacted by the aid of unjacketed hot isostatic pressure, and finally, a super-alloy part in the complicated shape is obtained by the aid of solid solution and aging treatment. Raw material powder cost and technological energy consumption are remarkably reduced, and prepared super-alloy is almost fully compact, uniform in structure and excellent in comprehensive mechanical property.

An electrical-energy-storage unit (EESU) has as a basis material a high-permittivity composition-modified barium titanate ceramic powder. This powder is double coated with the first coating being aluminum oxide and the second coating calcium magnesium aluminosilicate glass. The components of the EESU are manufactured with the use of classical ceramic fabrication techniques which include screen printing alternating multilayers of nickel electrodes and high-permittivitiy composition-modified barium titanate powder, sintering to a closed-pore porous body, followed by hot-isostatic pressing to a void-free body. The components are configured into a multilayer array with the use of a solder-bump technique as the enabling technology so as to provide a parallel configuration of components that has the capability to store electrical energy in the range of 52 kW·h. The total weight of an EESU with this range of electrical energy storage is about 336 pounds.

A method for forming a wear-resistant hardfaced contact area on the shroud section of a gas turbine engine blade. A predetermined contact area of a shroud section of a gas turbine engine blade is selectively coated with a high-density hardface coating material. The hardface coating material is capable of forming a diffusion boundary between the hardface coating material and the shroud section. A hot isostatic heat treatment process is performed to form the diffusion boundary between the hardface coating material and the shroud section to form a wear-resistant hardfaced contact area diffusion bonded to the shroud section. Depending on the coating process, and the necessity for doing so, the predetermined contact area can be masked off before the step of selectively coating. A sintering heat treatment can be perfomed before the step of performing the hot isostatic heat treatment to limit the occurrence bubbles on the surface of the hardface coating material after the isostatic heat treatment step. The sintering heat treatment may be performed at a temperature substantially the same as the temperature of the hot isostatic heat treatment. The hardface coating material may comprise an alloy with substantially no oxide forming constituents so as to avoid the formation of oxide inclusions in the coating material.

Hot-isostatic-pressure (HIP) is used to bond a cemented carbide inlay (e.g., an inlay ring) on a metal substrate (e.g., a hull ring). For example, an inlay ring is made from a powdered metal inlay preform typically comprising at least one metal carbide and at least one nonvolatile cement. The inlay preform is compressed and sintered to make an inlay ring having a predetermined shape, the inlay ring having a modulus of elasticity substantially greater than that of a hull ring. An inlay ring and a hull ring are sealingly vacuum brazed together with at least one evacuated bonding area between them. HIP is applied to compress the hull ring against the inlay ring, thus fusing the hull ring and inlay ring in at least one evacuated bonding area. Following HIP, the inlay ring and hull ring form a fused assembly in which the inlay ring substantially retains its predetermined shape.