Journal of the Japan Society of Powder and Powder Metallurgy
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
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Volume 9, Issue 1
Displaying 1-3 of 3 articles from this issue
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  • Phenomenological Study of Liquid Phase Sintering (1st Report)
    Sintering of Cu-Ag
    Yuji Okamoto
    1962 Volume 9 Issue 1 Pages 1-6
    Published: February 25, 1962
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.9.1
    JOURNAL OPEN ACCESS
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    Microstructure changes, particle growth and the rate of densification during sintering of Cu-Ag in the presence of a liquid phase have been observed. Rapid densification occurred in the early stage of sintering, and more rapidly as the amount of liquid phase and temperature increased.
    Particle growth by the solution-precipitation process was observed in this system. In a large amount of liquid, particles were larger in initial stage and smaller in final stage than in a small amount.
    Using spherical copper powders, it has been found that the starting particles was disintegrated into smaller particles.
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  • On the Preparation of Chromium Disilicide and Some Properties of it
    Kiyoshi Tamura, Toru Takeda
    1962 Volume 9 Issue 1 Pages 7-10
    Published: February 25, 1962
    Released on J-STAGE: December 04, 2009
    DOIhttps://doi.org/10.2497/jjspm.9.7
    JOURNAL OPEN ACCESS
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    Some basic properties of CrSi2 as a refractory hard material have been investigated. CrSi2 powder was prepared by arc melting of pure chromium and silicon mixture in an argon atmosphere and subsequently crushed by ball mill. This powder was then hot-pressed in vaccum.
    The specimens obtained were subjected to various tests, the results of which are summarized as follows.
    1 The optimum temperature in hot-pressing of CrSi2 was 1350°C. The density attained 97.0% of the theoretical value.
    2 Corrosion resistances to three kinds of dilute acids were superior to any other Disilisides which we had studied.
    3 The oxidation resistance at 1200°C was 0.0011g/cm2/day.
    4 Electrical resistance at room temperature was 646×10-6Ω-cm, 1900×10-6Ω-cm at 800°C.
    5 Thermo electromotive force at room and high temperature was 30 to 60 times higher than that of MoSi2 and TiSi2.
    6 In general, the hardness in hot state decreases with rising temperature. For instance, it was 280 at 800°C.
    7 Modulus of rupture at 800°C was 21.3kg/mm2.
    8 The thermal shock resistance of CrSi2 was poor.
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  • [title in Japanese]
    1962 Volume 9 Issue 1 Pages 11-46
    Published: February 25, 1962
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.9.11
    JOURNAL OPEN ACCESS
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