High-temperature behavior of precious metal base composites
High-temperature behavior of precious metal base composites
复制标题
贵金属基复合材料的高温行为
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
G. Sauthoff
中科院分区：
文献类型：
--
作者：
I. Wolff;G. Sauthoff
铂族金属(PGMS)金属间化合物具有很高的热力学稳定性和优异的力学性能，使其具有作为高温结构材料的潜力。在这项研究中，通过压缩试验评估了Ru-Al、Ir-Al、Ru-Nb、Ir-Nb和Ru-Al-Ni共晶复合材料的高温强度发展。所有测试的合金在极端温度下都具有高强度的特点，尤其是Ir84Nb16合金，其在1300‡C时的抗压应力超过600MPa.此外，几种合金在室温下表现出显著的压缩塑性.特别令人感兴趣的是，软组成相在演化强度方面的协同作用比简单的混合规则所预期的要大。第二相在提高强度和室温延展性方面的潜力使这些复合材料值得进一步研究。
The high thermodynamic stability and exceptional mechanical properties of intermetallic compounds based on platinum group metals (PGMs) make them potentially exploitable as structural materials for elevated temperature service. In this study, the development of high-temperature strength was evaluated for a selection of eutectic composites based on Ru-Al, Ir-Al, Ru-Nb, Ir-Nb, and Ru-Al-Ni using compression tests. All the alloys tested were characterized by high strength at extreme tem-peratures, none more so than an Ir84Nb16 alloy which had a proof stress in excess of 600 MPa at 1300 ‡C. In addition, several alloys showed significant compressional ductility at room temperature. Of particular interest is the synergy of soft constituent phases in evolving strengths greater than that anticipated by simple rules of mixture. The potential of secondary phases to advance both strength and room-temperature ductility makes these composites worthy of further investigation.