Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1991-03-12
1992-06-30
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
419 27, 419 49, 419 28, 428547, 428550, 428610, B22F 326
Patent
active
051261022
ABSTRACT:
The present invention is directed to a method of preparing a composite material excellent in joint strength and heat conductivity, and more specifically to a method of preparing a composite material composed of a high-melting material W and low-melting material Cu. The method comprising a first step of forming pores in the high-melting material W, to obtain a substrate material having a porosity distribution, with a high porosity at at least one region of the surface of the substrate material and the porosity gradually decreasing outward from the region; and a second step of impregnating the low melting material Cu to the substrate material obtained in the first step from the region of the highest porosity gradually downward. The substrate material being formed to have a gradient distribution of a composite ratio of the high-melting material and the low-melting material.
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patent: 5030518 (1991-07-01), Keller
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"Status of Fusion Reactor Development"/The Journal Published by the Welding Association of Japan, 56-3, p. 162; Yasuo Shimomura.
"Development of W/CU Gradient Composite Material by Sintering and Infiltrating Method (First Report)"/Collection of Summaries from Seminar Conducted by the Japan Metallurgical Association, the Spring Convention, 1990, p. 300; Masashi Takahashi et al.
"Development of W/Cu Gradient Composite Material by Sintering and Infiltration Method (Second Report)"/Collection of Summaries from Seminar Conducted by the Japan Metallurgical Association, the Autumn Convention, 1990, p. 552; Masashi Takahashi et al.
"Fabrication and Evaluation of W/Cu Gradient Material by Sintering and Infiltration Technique"/The First International Symposium FGM, p. 129; Masashi Takahashi et al.
"Development of W/Cu Composite with Gradient Structure"/The 10th HIP Seminar, p. 14; Yoshiyasu Itoh et al.
Itoh Yoshiyasu
Takahashi Masashi
Kabushiki Kaisha Toshiba
Lechert Jr. Stephen J.
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