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- Shimamura Keizo
- 東京芝浦電気(株)
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- Suzuki Kazuo
- 東京芝浦電気(株)
Bibliographic Information
- Other Title
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- 焼結体の圧縮変形モデル
- ショウケツタイ ノ アッシュク ヘンケイ モデル
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Abstract
To clarify the pore elimination processes in sintered preforms under static compressive stress, a model experiment is carried out.<BR>Spherical copper particles with particle size between 10 and 12 mesh are sintered in a graphite mold at 1000°C for 1 hr. Sintered preforms with a relative density of 48% are then compressed in cylindrical dies at compacting pressures from 0.5 to 10 ton/cm2 without any lubricant. Preform density after deformation is measured by means of size-weight measuring method and Archimedean method, and plotted against compacting pressure. Pore elimination due to deformation is examined by a scanning electron microscope.<BR>The results obtained are summarized as follows:<BR>1) Deforming process is separated into three characteristic stages. The transition from stage 1 to stage 2 occurs at the preform density of 74% theoretical, and the transition from stage 2 to stage 3 corresponds to the change from continuous to closed pore.<BR>2) Plastic deformation occurs in all the three stages, in stage 1 transitional restacking takes place, in stage 2 local deformation at contacting regions and stage 3 overall deformation of the bulk material.<BR>3) The volume of surface residual pore is about two-thirds of total pore volume.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 22 (8), 265-270, 1976
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390282681285095680
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- NII Article ID
- 130000814541
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- NII Book ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 1693298
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed