Processing and mechanical properties of materials in the Hf–N system
- 作者：Wuchina ; Eric ; Opeka ; Mark ; Gutierrez-Mora ; Felipe ; Koritala ; Rachel E. ; Goretta ; K.C. ; Routbort ; J.L.
- 关键词：Brittle&ndash ; to&ndash ; ductile transition (temperature) ; Dislication&ndash ; based plasticity ; Hf&ndash ; N alloys ; Hf&ndash ; N solid solutions ; Solid&ndash ; solution hardening ; Stress exponent ; Threshold stress
- 刊名：Journal of the European Ceramic Society
- 出版年：2002
- 期刊代码：53_09552219
- 类别：ms
- 出版时间：2002
- 卷：22
- 期：14-15
- 页码：2571-2576
- 文件大小：309 K
摘要
Samples of hexagonal α-Hf containing up to 30 at.%N in solid solution were made by a solid-state reaction. The brittle-to-ductile transition temperature increased as the%N increased. Steady-state compressive deformation has been measured from 20 to 1000 °C. The data for pure Hf could be fit using a threshold stress with a stress exponent of 5. The stress exponent of the Hf–N solid solution materials was between 5 and 8. The experiments could be interpreted on the basis of dislocation-controlled plasticity, with N acting as classical solid-solution hardening solutes. Transmission electron microscopy supported this interpretation.