低温焼結タングステン体について-3-Pd添加の影響

概要

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In the present study, authors examined the sintering characeteristics of Pd added tungsten powders, mechanical properties and some properties relating to electrical contact of W-Pd sintered compacts.<BR>The results were as follows.<BR>(1) In the case of 0.5% Pd addition and lhr sintering, dense sintered compacts were obtained above 1000°C sintering temperature. The effects of Pd addition on activated sintering of tungsten were weak to those of Ni-P alloy addition.<BR>(2) Vicker hardness number of W-Pd (Pd 1-5%) sintered compacts showed a maximum of 550 at 1000°C sintering temperature. The transvers rupture strength of Pd added tungsten sintered compacts were stronger than that of Ni-P alloy addition.<BR>(3) As axesuet of electrical, contact test, the amounts of wear of tungsten sintered compact by Pd addition up to 1% were similar to those of pure tungsten contact, the transfer phenomenon being not observed.
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