溶接学会論文集
Print ISSN : 0288-4771
微細粒子のろう付による沸騰伝熱面の形成に関する研究
久森 洋一町田 一道
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1998 年 16 巻 4 号 p. 479-486

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Heat-transfer surfaces for cooling system of high power semiconductor such as G.T.O (Gate Turn Off Thyrister) is developed. The surface which has high efficient heat-transfer rate is consisted with porous structures formed by brazing.
Ball like particles in diameter of about 0.4 mm with Ni-P prepared by plating on the surfaces are accum ulated on substrates with a few layers. Then the substrates with porous structure are obtained by heating under the brazing conditions of at 1223 K for 600 s in the 10-1 Pa atmosphere.
Efficiency of heat transfer rate of the brazed porous structure is about twice as high as the one of coarse surfaces by conventional shot-blast process.

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