航空材料学报2018，Vol.38Issue(1)：75-79,5.DOI:10.11868/j.issn.1005-5053.2017.000089
ZrN-Nb复合材料的致密化及力学性能
Densification and Mechanical Properties of ZrN-Nb Composites
摘要
Abstract
Densification of zirconium nitride (ZrN)ceramics was investigated by vacuum hot pressing at temperatures range from 1500℃to 2000 ℃with Nb as sintering additive. Densification was enhanced with Nb addition. ZrN with 5mol％ Nb addition achieved a rel-ative density of 98. 5％ at 1600 ℃. XRD and lattice parameter measurements indicated that there were structural differences between samples sintered in different temperatures. It was likely that due to the presence of point defects by changes in stoichiometry,the kinet-ics of mass transport enhanced. As a result,the relative density of the zirconium nitride (ZrN)ceramics have been improved,thus the fully densed ZrN ceramics can be prepared in a relative low temperature. The density,the room-temperature mechanical properties of ZrN ceramics are increased after the addition of Nb. Zirconium nitride (ZrN)doped with Nb sintered at 1600 ℃ are measured and ob-tained elasticity modulus of 238 GPa,flexural strength of 463. 3 MPa,fracture toughness of 7. 0 MPa·m1/2 and hardness of 10. 7 GPa.关键词
热压烧结/ZrN-Nb复合材料/致密化/组织结构/力学性能Key words
hot pressed sintering/ZrN-Nb composites/densification/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
张岩,郭英奎..ZrN-Nb复合材料的致密化及力学性能[J].航空材料学报,2018,38(1):75-79,5.基金项目
国家自然科学基金(51302053) （51302053）
