2005 Fiscal Year Final Research Report Summary
Development of High-Speed Centrifugal Compaction Process Using Fine Metallic Powders
| Project/Area Number |
15360389
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
KUROKI Hidenori Hiroshima University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (80037853)
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| Co-Investigator(Kenkyū-buntansha) |
SHINOZAKI Kenji Hiroshima University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (70154218)
SUZUKI Hiroyuki Hiroshima University, Graduate School of Engineering, Assistant, 大学院・工学研究科, 助手 (90284158)
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| Project Period (FY) |
2003 – 2005
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| Keywords | HCP / Separate dies / High energy milling / nonapueous Slurry / split mold |
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| Research Abstract |
In the present study, we have developed and improved each process step (preparation of slurries, compacting conditions, sintering conditions, etc) of high speed centrifugal compaction process (HCP).
Powders of stainless steel, high-speed steel and Inconel alloy under 5 micrometers in particle sizes have been processed into nonaqueous slurries, compacted by a high-speed centrifuge and sintered to nearly full density in solid state.
A super fine WC powder with particle diameter of 0.1 micrometer has been processed into nonaqueous slurry by a high-energy mill and finally sintered to a nearly full density with no sintering aid.
Design technologies for split molds have been established. The molds with a draft and O-rings are applicable to form complicated configurations by high-speed centrifuges.
The Coriolis' force has proved to be a cause of inhomogeneity introduced during compaction. Improving the steps of the compaction minimizes the inhomogeneity.
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