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 6, Issue 4
Displaying 1-5 of 5 articles from this issue
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  • On the Lubricants mixed into Iron Powder
    Takaaki Tabata
    1959 Volume 6 Issue 4 Pages 149-154
    Published: August 25, 1959
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.6.149
    JOURNAL OPEN ACCESS
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    In this paper, the lubricating abilities of several organic lubricants used in the powder metallurgy industry is investigated. On five kinds of lubricant, zinc stearate; stearic acid, aluminum stearate, lead stearate and, calcium stearate, mixing to Hoganas sponge iron powder, the following properties are compared with each other, as zinc stearate is standard.
    (1) Dispersivity for mixing into metal powder.
    (2) Effects on the physical characteristics of metal powder.
    (3) Lubricating abilities for powder compacting and ejecting.
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  • Study on OP magent (3rd Report)
    Influence of phosphates and arsenates of the element of Group II on OP magent
    Hiroshi Nakamura, Noboru Kawai, Hiroshi Yoshida
    1959 Volume 6 Issue 4 Pages 155-159
    Published: August 25, 1959
    Released on J-STAGE: July 12, 2010
    DOIhttps://doi.org/10.2497/jjspm.6.155
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    An attempt to improve magnetic and mechanical properties of OP magnet was made by adding phosphates and arsenates of the element of Group II. Oxides have often been added for such purpose. But we used the above-menti oned salts instead of oxides in expectation of getting the effect surely, because these salts were more stable than oxides up to about 1000°C, the sintering temp. for OP magnet.
    The experimental results obtained were as follows : 1) These salts can be added with same effect either before or after prefiring. 2) Addition of BaHPO4 by 2 wt. % enables us to get such OP magnet as Hc=1450 Oe., Br=2700 gauss and (BH)max=1.4×106 gauss⋅Oe. In an optimum condition, we have OP magnet of (BH)max=2.2×106 gauss⋅Oe. Also the mechanical property of these OP magnet is better than that of original one. 3) Addition of 1% Ba2As2O7 make OP magnet possible to have the characteristics of He=800 Oe., Br= 3800 gauss and (BH)max=1.5×106 gauss⋅Oe. The mechanical strength of this OP magnet is two or three times of the strength of the magnet without addition. 4) The phosphates not only promote the sitering of OP magnet, but also precipitate in crystal grain or at grain boundary to increase coercive force of the magnet. The arsenates promote the sintering more remarkably than the phosphates do.
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  • Preliminary Experiments on the Formation of TiC from Ti-hydride
    K. Ogawa, Y. Bando
    1959 Volume 6 Issue 4 Pages 160-164
    Published: August 25, 1959
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.6.160
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    Preliminary experiments have been made to obtain TiC by heatmg the mixture of Ti-hydride and carbon in hydrogen atmosphere and also in vacuo. The reaction products obtained were examined by chemical and X-ray analysis.
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  • [title in Japanese]
    [in Japanese]
    1959 Volume 6 Issue 4 Pages 165-171
    Published: August 25, 1959
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.6.165
    JOURNAL OPEN ACCESS
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  • [title in Japanese]
    [in Japanese]
    1959 Volume 6 Issue 4 Pages 172-173
    Published: August 25, 1959
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.6.172
    JOURNAL OPEN ACCESS
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