36results about How to "Promote grain growth" patented technology

A method of manufacturing a bit body, other drilling-related component, or other article of manufacture, including fabricating a particulate-based matrix and infiltrating the particulate-based matrix with a binder that includes cobalt or iron. The binder may be a cobalt alloy or an iron alloy. The particulate-based matrix may be disposed within a non-graphite mold. The particulate-based matrix and binder are placed within an induction coil and an alternating current is applied to the induction coil in order to directly heat the binder, permitting the binder to infiltrate or otherwise bind the particles of the matrix together. The molten binder may then be directionally cooled by forming a cooling zone around an end portion of the bit body and increasing the size of the cooling zone relative to the bit body. The invention also includes a bit body, other drilling-related component, or other article of manufacture which includes a particulate-based matrix that is bound together with a binder that includes iron or cobalt.

A gamma prime precipitation-strengthened nickel-base superalloy and method of forging an article from the superalloy to promote a low cycle fatigue resistance and high temperature dwell behavior of the article. The superalloy has a composition of, by weight, 16.0-22.4% cobalt, 6.6-14.3% chromium, 2.6-4.8% aluminum, 2.4-4.6% titanium, 1.4-3.5% tantalum, 0.9-3.0% niobium, 1.9-4.0% tungsten, 1.9-3.9% molybdenum, 0.0-2.5% rhenium, greater than 0.05% carbon, at least 0.1% hafnium, 0.02-0.10% boron, 0.03-0.10% zirconium, the balance nickel and incidental impurities. A billet is formed of the superalloy and worked at a temperature below the gamma prime solvus temperature of the superalloy so as to form a worked article, which is then heat treated above the gamma prime solvus temperature of the superalloy to uniformly coarsen the grains of the article, after which the article is cooled to reprecipitate gamma prime. The article has an average grain size of not coarser than ASTM 7 and is substantially free of critical grain growth.

The invention relates to an extra coarse grain WC-Co hard alloy. The hard alloy comprises 5 to 15 weight percent of Co and the balance of WC, wherein the average grain size of the WC is 6 to 10mu m. A preparation process for the hard alloy comprises the following steps of: pre-ball-milling coarse and fine tungsten carbide to prepare mixed tungsten carbide powder, preparing mixed tungsten carbide powder-cobalt-former mixed powder, pressing, and sintering, wherein the sintering step is divided into a former removing part and a high-temperature sintering part. The average grain size of a metallographic structure of the WC-Co hard alloy prepared by the process is 6mu m or more than 6mu m, the process method is simple and convenient to operate, the prepared hard alloy has a large average grainsize, a narrow grain distribution range, a low thermal expansion coefficient and high heat conductivity, high-temperature wear resistance, transverse rupture strength and rupture toughness, and is suitable for a mining tool and an excavating tool, and the thermal fatigue crack resistance of the alloy is effectively improved.

A ceramic sheet 20 is produced by a method in which inorganic particles including, as a main component, an oxide represented by general formula ABO₃ and containing a volatile component are mixed such that the A/B ratio is 1.05 or more, the inorganic particles are formed into a self-supported planar shaped body with a thickness of 30 μm or less, and the shaped body is fired, without an inactive layer or with an inactive layer which does not substantially react with the shaped body and is disposed adjacent to the shaped body, at a temperature-rising rate of 30° C./min or more in a temperature range which is equal to or higher than a temperature at which the volatile component is volatilized.

The invention provides a copper target assembly and a manufacturing method of the copper target assembly. The manufacturing method comprises the steps that a back plate and a copper target are provided, wherein the back plate comprises a first welding face, and the copper target comprises a second welding face; a pattern composed of multiple protrusions is formed on the first welding face; the second welding face and the first welding face provided with the pattern are oppositely arranged and attached to each other to form an initial assembly; welding treatment is conducted on the initial assembly, the protrusions of the first welding face are embedded into the second welding face, a welded layer is formed between the copper target and the back plate, the thickness of the welded layer is larger than or equal to the height of each protrusion, and then the copper target assembly is obtained. By the adoption of the copper target assembly and the manufacturing method of the copper target assembly, the possibility that a gap appears in the welded layer is effectively reduced, so that the quality and performance of the formed copper target assembly can be effectively improved, and the yield and performance of a manufactured semiconductor chip are improved beneficially.

The invention discloses a sodium doping method for a CIGS-based thin film photovoltaic material. According to the method, a substrate, a barrier layer covering the surface of the substrate, a metal back electrode layer covering the barrier layer, a light absorption layer covering the metal back electrode layer, a buffering layer covering the light absorption layer and a transparent conductive window layer covering the buffering layer are included. Sodium doping is carried out on light absorption through the method of depositing Ga-Na alloy materials, heat treatment is carried out on the light absorption layer, and therefore the light absorption layer material containing sodium with the atomic ratio between copper and the sum of indium and gallium is 0.84-0.99 can be formed.

A copper film is annealed at high pressure to enhance grain growth and remove voids. Other films, such as dielectrics, may also be suitable. High pressure can be used in conjunction with temperatures lower than room temperature for annealing or higher temperatures may be used to further enhance grain growth.

A three-dimensional slow release agent absorbent dressing particularly suitable for use in sinus cavity or infective wounds comprises a wound-contacting layer surrounding outside of the dressing. The wound-contacting layer is a soft-film covered with tapered apertures and the bottom surface of said tapered apertures faces outside to contact a wound for discharging exudate from the wound in many directions and transmitting exudate via a diffusion guiding layer to absorbent articles. Said absorbent articles formed of high-molecular polymeric fibers are mixed with a certain concentration of water-soluble agents, such as antiseptic agents, enzymes and growth factor agents, in a suitable amount. After exudate is into absorbent articles, said polymeric fibers expand forming into the shape of gel to avoid exudate flowing backward to the wound, which is more effective in preventing the wound from secondary infection.

A voidless CMH lamp and a method of making such a lamp are provided. The CMH lamp includes a lamp body that receives at least one end plug. The end plug is constructed from a core of cermet material received within an outer layer of a ceramic material. An electrode is placed into the cermet material. The application of heat causes the cermet material to contract and eliminate voids between the lamp and cermet material. Co-sintering of the lamp, core, and outer layer provides a hermetic seal without necessarily using e.g., a sealing frit. Sintering of the ceramic material surrounding the cermet can be also used to improve light output and photometric performance of the lamp. The creation of one or more openings or recesses in the end plug can also provide performance improvements.

A compact is obtained from a mixed powder of a multi-component system ceramics composed of constitutive elements of at least two metal elements selected from the group consisting of Ti, Al, V, Nb, Zr, Hf, Mo, Ta, Cr, and W, N, and optionally C; and Fe, Ni, Co, or an alloy composed of a constitutive element of at least one metal element of Fe, Ni, and Co. A composite material is prepared by sintering the compact.

The invention discloses a heat treatment technology of a steel-grade oil casing. The technology comprises the following steps of 1, annealing of a steel pipe, wherein the steel pipe is heated to 650-750 DEG C, subjected to heat preservation and cooled; 2, normalizing of the steel pipe, wherein the cooled steel pipe is heated to 750-850 DEG C, subjected to heat preservation and cooled; 3, quenchingof the steel pipe, wherein the cooled steel pipe is heated to 650-750 DEG C, subjected to heat preservation and then quickly cooled to obtain martensite; 4, tempering of the steel pipe, wherein the martensite steel pipe is heated to 650-750 DEG C, the tempering time is 1.5-2 h, and the steel pipe is subjected to heat preservation and then cooled. Two modes of oil cooling and natural cooling in air are adopted for cooling in the first step, the second step and the fourth step, and in the third step, the pipe is filled with liquid nitrogen, and a liquid nitrogen cooking mode is adopted. According to the heat treatment technology, the hardenability and mechanical properties of the steel pipe can be improved through heat treatment products, the bending protection effect is better, and the steel pipe is not easily broken.

A method for producing a crystallographically-oriented ceramic includes the steps of forming a first sheet with a thickness of 10 μm or less containing a first inorganic material in which grain growth occurs at a first temperature or higher and a second sheet containing a second inorganic material in which grain growth occurs at a second temperature higher than the first temperature, laminating one or more each of the first and second sheets to form a laminated body, firing the laminated body at a temperature equal to or higher than the first temperature and lower than the second temperature to cause grain growth in the first inorganic material, and then firing the laminated body at a temperature equal to or higher than the second temperature to cause grain growth in the second inorganic material in the direction of a crystal plane of the first inorganic material.

The invention discloses a method for preparing an AgBiS2 semiconductor film. The method includes first preparing a solution containing silver and a solution containing bismuth separately, then mixingthe two solutions, adding thiourea, heating and stirring, then adding an additive for mixing to obtain a stable precursor solution with suitable viscosity, conducting film coating and pre-burning to obtain a preformed layer, and finally conducting an annealing process to enhance the film crystallinity and obtain the AgBiS2 semiconductor film. The method has the advantages of simple operation, mildreaction conditions, low requirements on equipment, low cost and easy industrial production. The prepared AgBiS2 semiconductor film has good film formation quality, large particles and pure phase, and is beneficial to improve the photovoltaic performance of a film material. The film has high light absorption coefficient, suitable forbidden band width, good electrical property and high carrier mobility, and is very suitable to serve as an absorption layer material for a thin film solar battery.

The invention relates to a method for preparing forsterite refractory material through microwave heating. The method includes: well mixing nickel-iron slag, magnesia powder and a binder, press-shaping to obtain a blank, putting the blank after being dried into a microwave reactor, and holding temperature of 1250-1340 DEG C for calcining for 10-60min to obtain a forsterite refractory material; according to formula composition, regulating and controlling a gradient temperature increase program of the microwave heating process to optimize phase transformation of the nickel-iron slag and grain growth process of the refractory material; combining with grain ratio of the nickel-iron slag and the magnesia powder, and accurately controlling porosity of the forsterite refractory material to finally obtain the forsterite refractory material which has high compressive strength and excellent thermal shock resistance. The method has the advantages of high sintering speed, low energy consumption, high production efficiency, high resource utilization rate, environment friendliness and excellent material performance and has good industrial application prospect.

The invention discloses a quaternary lithium-rich manganese-based positive electrode material using Zn to replace Mn and a preparation method of the quaternary lithium-rich manganese-based positive electrode material, and belongs to the technical field of lithium ion battery positive electrode material production. A carbonate coprecipitation method is adopted, a metal salt solution and a precipitant solution are controlled to react in a base solution to prepare a precursor, and the precursor is calcined to obtain the positive electrode material with the structural formula of xLi2MnO3-(1-x) LiMO2. According to the method disclosed by the invention, the grade resonance is promoted, a more powerful support is provided for the material, and the stability of the material is improved, so that the performance of the positive electrode material is obviously improved, and the circularity is improved.

The invention provides a low-loss LiZnTiMn gyromagnetic ferrite material and a preparation method thereof, and belongs to the technical field of magnetic materials. The gyromagnetic ferrite material comprises a main material and a composite sintering aid, the weight percentage of the main material is 99.0%-99.5%, and the weight percentage of the composite sintering aid is 0.5%-1.0%; the main material is Li < 0.42 > Zn < 0.27 > Ti < 0.11 > Mn < 0.1 > Fe < 2.1 > O < 4 >, the composite sintering aid is composed of Bi2O3 and Nb2O5, and the mass ratio of Bi2O3 to Nb2O5 is 5: (1-5). The low-temperature sintering of LiZnTiMn is realized by optimizing the sintering process and adding the composite sintering aid, the LiZnTiMn ferrite material with low loss is obtained, the coercive force of the material is reduced, and the performance of the material is optimized.

An yttrium oxide-based sintered body includes yttrium oxide as a predominant component. The sintered body includes aluminum in an amount of 0.1 mass % to 0.5 mass % inclusive as reduced to aluminum oxide, has a metal content of 1,000 ppm or less, the metal excluding yttrium and aluminum, and has a relative density of 98% or higher. By virtue of the yttrium oxide-based sintered body, a plasma resistance comparable to that of a high-purity (99.9%) yttrium oxide sintered body can be achieved. Also, since the relative density is sufficiently high, plasma resistance can be enhanced. As a result, the yttrium oxide-based sintered body can be suitably used as a large-scale member by virtue of excellent mechanical strength.

A slow release agent absorbent dressing particularly comprises a wound-contacting layer covered with tapered apertures. The bottom surface of said tapered apertures contacts a wound area to discharge exudate from the wound area and transmit exudate via a guiding layer to an absorbent layer. Said absorbent layer formed of high-molecular polymeric fibers is mixed with a certain concentration of water-soluble agents, such as antiseptic agents, enzymes and growth factor agents, in a suitable amount. After exudate is into the absorbent layer, said polymeric fibers expand forming into the shape of gel to avoid exudate flowing backward to the wound area. Also, a translucent evaporating layer having numerous micro pores for air venting is above the absorbent layer and the peripheral edges are joined together in the form of a sealed structure by heat-sealing to stop side escape of exudate, which is more effective in preventing the wound area from secondary infection.