| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10155382 | Ceramics International | 2018 | 22 Pages |
Abstract
Thermodynamically stable (Hf1-xTax)C (xâ¯=â¯0.1-0.3) compositions were selected by First Principle Calculation and synthesized in nanopowders via high-energy ball milling and carbothermal reduction of commercial oxides at 1450â¯Â°C. The formation of a solid solution during powder synthesis was investigated. The solid solution carbide powders were sintered at 1900â¯Â°C by spark plasma sintering without a sintering aid. As a result, the (Hf1-xTax)C solid solution carbides exhibited high densities, excellent hardness and fracture toughness (Ï: 98.7-100.0%, HVN: 19.69-19.98â¯GPa, KIC: 5.09-5.15â¯MPaâ¯m1/2) compared with previously reported HfC and HfC-TaC solid solution carbides.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Daegwon Ha, Jiwoong Kim, Jisun Han, Shinhoo Kang,