Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

1519 results about "Cermet" patented technology

A cermet is a composite material composed of ceramic (cer) and metal (met) materials. A cermet is ideally designed to have the optimal properties of both a ceramic, such as high temperature resistance and hardness, and those of a metal, such as the ability to undergo plastic deformation. The metal is used as a binder for an oxide, boride, or carbide. Generally, the metallic elements used are nickel, molybdenum, and cobalt. Depending on the physical structure of the material, cermets can also be metal matrix composites, but cermets are usually less than 20% metal by volume.

Laser near-net shaping method for metal-ceramic multi-dimensional functionally-graded structural component

ActiveCN103121103AControl ratioAchieve continuous changeNumerical controlVertical plane
The invention discloses a laser near-net shaping method for a metal-ceramic multi-dimensional functionally-graded structural component. According to the laser near-net shaping method for the metal-ceramic multi-dimensional functionally-graded structural component, a laser fast shaping system is used for combining metal powder and ceramic powder, which are used as raw materials and have changeable proportioning rates, to form the multi-dimensional functionally-graded structural component directly. The laser near-net shaping method specifically includes the following steps: firstly, two types or more than two types of metal powder and ceramic powder are dried and respectively placed in different powder barrels of a powder feeding device; secondly, inert gas is used as powder feeding and protecting gas; and lastly, a numerical control program is used for controlling the moving trajectory and the moving speed of a laser machining head and the real-time powder feeding amount of each powder barrel of the powder feeding device, the change of gradients can be realized in a horizontal plane and a vertical plane of a base plate, and therefore the complex multi-dimensional gradient change in the overall space can be realized. On one hand, the laser near-net shaping method for the metal-ceramic multi-dimensional functionally-graded structural component is a direct shaping method, and on the other hand, the laser near-net shaping method is suitable for melting solidification shaping of various high-melting-point materials, and the selection range of the design of functionally-graded materials is expanded.

Laser-induction hybrid melting direct forming method and device

The invention discloses a laser-induction hybrid melting direct forming method and device. The laser-induction hybrid melting direct forming method comprises the following steps of: generating a three-dimensional model of a part through CAD (Computer-Aided Design) software, and then slicing the three-dimensional model and generating a G code to drive a numerical control system and a base body to move; and melting synchronously fed metal or metal/ceramic hybrid powder through a high-power laser beam and an induction heat source, and depositing the three-dimensional part in a designed shape layer by layer, wherein a temperature controller is used for monitoring and controlling the temperature of the base body in the processing process. The device for realizing the laser-induction hybrid melting direct forming method comprises a laser, a light path system, an induction heating and temperature control system, a powder feed system and the numerical control system. The device can be used for directly generating large and medium size three-dimensional parts on various metal base bodies, has the advantages of high processing efficiency, compact part structure, fine crystalline grain, excellent mechanical property, less residual stress without deformation or cracking phenomenon, high processing flexibility without tools and moulds, high material utilization ratio, cleanness without pollution and capability of designing the components of a metal-ceramic hybrid layer as required and even changing the components in a gradient manner.

Brazing material and preparation method thereof as well as brazing method using the material

The present invention relates to a soldering material, a preparation method thereof and a soldering method with the soldering material, which belong to the preparation methods and applications of soldering materials. The present invention resolves the problem that the connection strength and the working temperature are low after the prior Ti(C, N)-based cermet is connected with a metal, thus realizing the firm connection between the Ti(C, N)-based cermet and steel, and ensures that the joint has good connection strength and a high working temperature. The mass percentage of the ingredients of the soldering material of the present invention is as follows: 40 percent to 45 percent of Cu, 20 percent to 25 percent of Ag, 21 percent to 23 percent of Zn, 5 percent to 10 percent of Ni, 1 percent to 3 percent of Ti and 1 percent to 5 percent of Si. The preparation method includes the following steps: mixing, pressing, sintering and rolling, rolling the soldering material into a soldering material sheet. The soldering method with the soldering material includes the following steps: presoldering preparation, assembly, temperature increasing and temperature decreasing. The soldering material and the soldering method which are adopted by the present invention successfully realize the firm connection between the Ti(C, N)-based cermet and 45 steel, the maximum room-temperature shearing strength of the joint reaches 268.5MPa, and the average shearing strength reaches 240.9MPa.

Heat-collecting tube with solar energy selective absorption coating and manufacturing method thereof

The invention provides a heat-collecting tube with a solar energy selective absorbing coating and the manufacturing method thereof. The solar energy selective absorbing coating is deposited on the outer surface of the basis material steel tube, the two ends of the steel tube have a non-film area, the inner cavity is filled with flowing working substance, and the coating is formed by the following steps: forming a transition layer and an adhesion layer on the basis material, depositing a metal infrared reflection layer, sputtering a protective layer and a cermet absorbing layer and finally an antireflection layer. The manufacturing method is provided with the following steps: (1) the transition layer is formed on the basis by firing; (2) the adhesion layer and the infrared reflection layer are sputtered; (3) the proactive layer is coated by the magnetron sputtering method; (4) the cermet absorbing layer is deposited by the double-target sputtering method; (5) the antireflection layer is sputtered; and (6) the heat-collecting tube with the coating is subjected to vacuum treatment at 200-350 DEG C to enable the film coating to be compacter. The heat-collecting tube is applied to high temperature air, each performance is stable and realizable, and the service life is long.

Solar selective absorbing coating and preparation method thereof

The invention discloses a solar selective absorbing coating and a preparation method thereof. The coating comprises three layers of films from bottom to top on the surface of a heat absorber substrate; the first layer is an infrared reflective layer and consists of a metal molybdenum film; the second layer is an absorption layer, consists of a composite metal ceramic layer made from Ni-Al alloy particles and an insulating medium and is formed by two sublayers with different thicknesses and different Ni-Al alloy volume percentages in structure, wherein the thickness of the first sublayer is 35-70nm, the Ni-Al alloy volume percentage of the first sublayer is 40-60 percent, the thickness of the second sublayer is 30-60nm, and the Ni-Al alloy volume percentage of the second sublayer is 20-40 percent; the third layer is an anti-reflection layer formed by an aluminum oxide ceramic film. The preparation method thereof comprises three steps. Under the condition that an air quality factor AM is 1.5, the absorptivity of the coating is no less than 0.93, and the emissivity of the coating is no more than 0.09. The coating has good heat stability and can be used in the vacuum environment at the temperature of 600 DEG C for a long term. The invention has the practical value and wide application prospect in the technical field of solar heat utilization and thermal generation.

Method for preparing ceramic particle enhanced metal matrix composite coating in laser cladding mode through asynchronous powder feeding method

The invention provides a method for preparing a ceramic particle enhanced metal matrix composite coating in a laser cladding mode through an asynchronous powder feeding method. A lateral powder feeding nozzle is fixed to one coaxial powder feeding nozzle and assembled into an asynchronous powder feeding nozzle; the lateral powder feeding nozzle is used for feeding ceramic particle enhancing phases into the portion between the middle portion and the tail portion of the side, opposite to the laser scanning direction, of a molten pool; the coaxial powder feeding nozzles are used for feeding alloy powder or metal ceramic composite powder to the center of the molten pool; a laser device is used for conducting laser cladding, and then the ceramic particle enhanced metal matrix composite coating is obtained. According to the method, the coaxial powder feeding method and the lateral powder feeding method are combined, the ceramic particle enhancing phases are fed into the low-temperature region at the rear portion of the molten pool, so that the phenomena of nonuniformity of melting decomposition, clustering and distribution of the ceramic particle enhancing phases are reduced, and the ceramic particle enhancing phases are evenly distributed in the whole coating by keeping the original appearance to the maximum extent; accordingly, the ceramic particle enhancing phases are effectively retained and evenly distributed, and the performance of the composite coating can be substantially improved.
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products