摘要
研究单芯Ｎｂ－Ｔｉ／ＴｉＡｌ及Ｎｂ－Ｔｉ／Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ两种模拟材料试样的界面特性。结果表明，在同一条件下热等静压成型的两种复合模拟试样，其界面均由厚度、显微硬度不同的反应层构成。Ｎｂ－Ｔｉ／Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ试样的界面结合完整，界面层较厚，界面结合强度为１２３．７ＭＰａ；Ｎｂ－Ｔｉ／ＴｉＡｌ的界面层较薄，近基体侧界面有径向裂纹，界面结合强度为９４．８ＭＰａ，均高于未涂覆Ｔｉ的模拟试样的界面结合强度。压脱试验后，前者仅沿近纤维侧界面开裂，后者的界面层沿纤维和基体均发生开裂，径向微裂纹甚至扩展到基体中。
The interfacial features of Nb-Ti/TiAl or Nb-Ti/Ti-48Al-2Cr-2Nb composite were investigated by using the simulated specimens,.The results showed that there are obvious differences in interfacial features for these two hot isostatic pressing(HIP) specimens under the same condition. The Nb-Ti/Ti-48Al-2Cr-2Nb specimens had intact and thicker interfacial reaction layers and maximum interfacial bonding strength, up to 123 MPa,and the Nb-Ti/TiAl specimens had thin interfacial reaction layers and higher interfacial bonding strength(94.8MPa) than those of Nb-rod uncoated with Ti. After test, braeks occurred first in interface near Nb-rod in Nb-Ti/Ti-48Al-2Cr-2Nb specimens and second in interface near either Nb-rod or matrix in the Nb-Ti/TiAl specimens, and radial crack expanded matrix.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
1998年第3期23-27,共5页
Ordnance Material Science and Engineering
基金
航空科学基金
关键词
复合模拟试样
界面结合强度
断裂特征
复合材料
TiAl,composite simulative materials, interfacial bonding strength, rupture feature
