摘要:
PROBLEM TO BE SOLVED: To provide an aluminum raw material for sintering capable of obtaining a porous aluminum sintered compact of high quality efficiently producible at a low cost, having a reduced shrinkage percentage upon sintering and excellent dimensional accuracy, and further having sufficient strength.SOLUTION: Provided is an aluminum raw material 20 for sintering used when a porous aluminum sintered compact in which a plurality of aluminum base materials 11 are sintered, and comprises: the aluminum base materials 11; and a plurality of titanium powder grain 22 stuck to the outer surfaces of the aluminum base materials 11. The titanium powder grains 22 is one or both of metal titanium powder grains and titanium hydride powder grains.
摘要:
The heat conductivity of an aluminum composite material containing a fibrous carbon material is enhanced. In order to realize this, a spark plasma sintered body having a fibrous carbon material compounded in a metal matrix powder of aluminum or the like is fabricated. At the time of fabrication, an aluminum powder serving as a matrix mother material is compounded with an Al alloy powder such as an Al-12Si powder having a melting point lower than the sintering temperature of the mother material. During the process of sintering the aluminum powder, the Al alloy powder is melted, whereby the heat conductivity between the aluminum powder particles and between the aluminum powder particle and the fibrous carbon material is improved.
摘要:
Disclosed herein is a composite material comprising a metal and nanoparticles, in particular carbon nano tubes as well as a method of producing the same. A metal powder and the nanoparticles are processed by mechanical alloying, such as to form a composite comprising metal crystallites having an average size in the range of 1-100 nm, preferably 10 to 100 nm or in a range of more than 100 nm and up to 200 nm at least partly separated from each other by said nanoparticles.
摘要:
PROBLEM TO BE SOLVED: To provide a high-strength titanium alloy material which is highly strengthened in whole by applying nitrogen in a highly versatile α-β type titanium alloy.SOLUTION: A process for producing the high-strength titanium alloy member includes: a step of preparing a sintering titanium alloy raw material that serves as a raw material for a sintered product; a nitrogenation step of forming a nitrogen compound layer and/or a nitrogen solid solution layer on the surface layer of the sintering titanium alloy raw material by a nitrogenation treatment to produce a nitrogen-containing sintering titanium alloy raw material; a mixing step of mixing the sintering titanium alloy raw material with the nitrogen-containing sintering titanium alloy raw material to produce a sintering titanium alloy raw material containing a nitrogen-containing titanium alloy; and a sintering step of bonding the raw materials to each other in the sintering titanium alloy raw material containing the nitrogen-containing titanium alloy and dispersing nitrogen contained in the nitrogen compound layer and/or the nitrogen solid solution layer in the nitrogen-containing sintering titanium alloy raw material uniformly in the form of a solid solution in the whole of the inside of the titanium alloy member after sintering.
摘要:
PROBLEM TO BE SOLVED: To enhance the thermal conductivity of an aluminum composite material containing a fibrous carbon material. SOLUTION: In a process of producing a discharge plasma sintered compact in which a metal matrix powder of aluminum or the like is blended with the fibrous carbon material, the aluminum powder which is the matrix base metal is blended with an Al alloy powder such as an Al-12 Si powder having a melting point lower than a sintering temperature of the base metal. The Al alloy powder melts in a process of sintering the aluminum powder to improve the thermal conductivity among the aluminum powder particles, and between the aluminum powder particles and the fibrous carbon material. COPYRIGHT: (C)2009,JPO&INPIT