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Volume 5 (1958)
- Issue 3 Pages 147-
- Issue 2 Pages 80-
- Issue 1 Pages 1-
Volume 5, Issue 2
Displaying 1-7 of 7 articles from this issue
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Takeshi Takei, Mitsuo Sugimoto, Sadahiko Sekiguchi1958 Volume 5 Issue 2 Pages 80-84
Published: October 20, 1958
Released on J-STAGE: May 22, 2009
JOURNAL OPEN ACCESSMost of the soft ferromagnetic ferrites are manufactured by sintering the prefired powder of mixed oxides. As the particle size of the powder have a marked influence on the properties of the sintered ferrite, the authors measured the size and its distribution of the powder and found the relation between the particle size and ball milling time of the prefired ferrite as shown in Fig. 1
Density of the sintered ferrite was also measured and it was found that it increases noticeably as the ball milling time of the prefired ferrite increases in the case of low temperature sintering. Whereas, the change of the density is small and not regular-in some case it decreases-in the case of high temperature sintering as shown in Fig. 2 and Fig. 3.
Shrinkage in sintering was also measured. In most cases, it increases a little as the ball milling time increases as shown in Fig. 4. The reasons of these changes were discussed.View full abstractDownload PDF (1949K) -
Kiyoshi Akabane, Shun-ichi Yashima1958 Volume 5 Issue 2 Pages 85-96
Published: October 20, 1958
Released on J-STAGE: May 22, 2009
JOURNAL OPEN ACCESSDouble cone type mixer was manufactured for the present experiments, and sampling of metal powders was investigated by statistical method.
As the result of experiment it was recognized that metal powders are unified for a few minutes by mechanical mixing, but oxidation of powder and collapse of dendritic powder are inevitable to some extent.
Following to M. P. A. Metal Powder Association Standard, the original bill of JIS (Japanese Industrial Standard) of sampling of metal powders was prepared by Powder Metallurgy Commitee based upon our experimental dataView full abstractDownload PDF (2208K) -
[in Japanese]1958 Volume 5 Issue 2 Pages 97-106
Published: October 20, 1958
Released on J-STAGE: May 22, 2009
JOURNAL OPEN ACCESSIn this paper, geometrical and chemical phenomenon in compacting and sintering processes of iron powders were investigated. Used powders were produced by various methods i.e. stamping, eddy milling and hydrogen reducing.
Effect of shape factors of iron powders on such processes were observed through the characteristic feature when taping or compacting. As far as it was not sintered at high temperature, such a packing feature was remaind. But treatments of high pressure pressing, powder mixing between some shape or size, and high temperature sintering made to lose such a feature, especially the treatment of high temperature sintering made to progress the grain growth between each powder. So the geometrical characteristics of pore when produced by compacting were diminished.View full abstractDownload PDF (3714K) -
[in Japanese]1958 Volume 5 Issue 2 Pages 107-114
Published: October 20, 1958
Released on J-STAGE: May 22, 2009
JOURNAL OPEN ACCESSDownload PDF (1756K) -
[in Japanese]1958 Volume 5 Issue 2 Pages 124-126
Published: October 20, 1958
Released on J-STAGE: May 22, 2009
JOURNAL OPEN ACCESSDownload PDF (227K) -
[in Japanese]1958 Volume 5 Issue 2 Pages 127-129
Published: October 20, 1958
Released on J-STAGE: May 22, 2009
JOURNAL OPEN ACCESSDownload PDF (309K) -
[in Japanese]1958 Volume 5 Issue 2 Pages 130-136
Published: October 20, 1958
Released on J-STAGE: May 22, 2009
JOURNAL OPEN ACCESSDownload PDF (460K)
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