2002 Fiscal Year Final Research Report Summary
Consolidation of diamond and related material powders using hot dynamic compaction
| Project/Area Number |
12555201
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Material processing/treatments
|
|---|
| Research Institution | Kumamoto University |
|---|
Principal Investigator |
HOKAMOTO Kazuyuki Kumamoto Univ., Shock Wave and Condensed Matter Research Center, Associate Professor, 衝撃・極限環境研究センター, 助教授 (70199462)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
UJIMOTO Yasuhiro Asahi-kasei Corp, Research engineer, 化薬研究所, 主幹研究員
FUJITA Masahiro Sojo University, Dept. of Mechanical Eng., Professor, 工学部, 教授 (20040389)
ITOH Shigeru Kumamoto Univ., Shock Wave and Condensed Matter Research Center, Professor, 衝撃・極限環境研究センター, 教授 (80069567)
|
|---|
| Project Period (FY) |
2000 – 2002
|
| Keywords | Powder compaction / Dynamic compaction / Diamond / High-temperature shock consolidation / Diamond and related materials |
|---|
| Research Abstract |
A new system for hot dynamic compaction is developed and used for consolidating diamond and related material powders.
For designing the system, the recovery of the sample is considered seriously due to the difficulty of its recovery at high temperature condition. Using a high explosive PBX whose detonation velocity is about 8.5 km/s, as well as using a moderate converging underwater shock wave assembly designed using numerical simulation, various diamond and related materials powders, are tried to be consolidated. The maximum pressure applied to the powders is estimated about 50 GPa and the optimum temperature for consolidation is ranging from 1150 to 1200 ℃. Graphitization above the temperature makes decrease the hardness of the recovered compacts.
Under the optimum condition, the bulk materials of diamond and related materials show quite high hardness ranging from 60 to 100 GPa, Few cracks are observed but some blocks in the order of a few mm size are available. A sample of the mixture of diamond and c-BN powders shows a reaction between these materials keeping the diamond structure so called heterodiamond.
|
