2013 Fiscal Year Final Research Report
Consolidation of Diamond-Based Composite by Rapid Sintering Using CVD-Coated Powder
| Project/Area Number |
24760558
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Composite materials/Physical properties
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | ダイヤモンド / 炭化ケイ素 / シリカ / 化学気相析出 / 緻密化 / 放電プラズマ焼結 / コア/シェル構造 / 複合体 |
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| Research Abstract |
Polycrystalline Diamonds (PCDs) are generally prepared by sintering at ultra-high pressure about several GPa because of low sinterability and transformation to graphite at high temperatures. This research aimed to prepare dense Diamond-based composites under moderate pressures (below 100 MPa) by Spark Plasma sintering (SPS) using nano-composite powders via a rotary chemical vapor deposition (CVD) technique.
SiC nano-layers were coated on Diamond powder by rotary CVD. The Diamond/SiC core/shell nano-structured powder was consolidated by SPS with SiO2 powder. The resultant Diamond-based composite with SiC and SiO2 exhibited the high relative density of 94% and the high Vichers hardness of 39 GPa.
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