摘要
利用电子束物理气相沉积技术(EB-PVD)制备NiCrAl/Ni3Al微叠层复合材料,对其在制备态和时效态不同温度下的力学性能进行试验,考察不同时效温度对材料拉伸性能的影响。结果表明,制备态样品沿柱状晶晶界发生脆性断裂,而热处理态样品的断口具有典型的韧性断裂特征。力学性能测试结果表明,经过适当的热处理后,微层材料室温和高温力学性能与制备态时相比,有明显的改善。经740℃/32h热处理后,材料性能明显提高。
NiCrAl/Ni3Al microlaminate composites were fabricated by electron beam physical vapor deposition （EB-PVD）. The tensile tests for microlaminate samples under different temperature were performed on the as-deposited and aged state composites. The relationship of aging temperature and tensile properties for laminates was investigated. The results show that brittle rupture occurs along the intergranular of column crystals of as-deposited specimens, while the fractures of annealed specimens are tough fractures. Compared with those of condensates, mechanical properties of microlaminates at room and high temperatures are enhanced by heat-treating at 740℃ for 32h.
出处
《航空材料学报》
EI
CAS
CSCD
2007年第4期46-49,共4页
Journal of Aeronautical Materials
关键词
电子束物理气相沉积
微叠层复合材料
力学性能
electron beam physical vapor deposition（EB-PVD） microlaminate composites
mechanical properties
