Solid-State Diffusion Bonding of NbSS/Nb5Si3 Composite Using Ni/Al and Ti/Al Nanolayers

被引：6
|
作者：
Ren, Xin-Yu [1 ]
Ren, Hai-Shui [1 ]
Kang, Yong-Wang [2 ]
Xiong, Hua-Ping [1 ]
Pei, Chong [1 ]
Chen, Bo [1 ]
Cheng, Yao-Yong [1 ]
Ustinov, A., I [3 ]
机构：
[1] Beijing Inst Aeronaut Mat, Welding & Plast Forming Div, Beijing 100095, Peoples R China
[2] Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing 100095, Peoples R China
[3] NAS Ukraine, EO Paton Elect Welding Inst, UA-03680 Kiev, Ukraine
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2019年 / 32卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Nb-SS; Nb5Si3; composite; Diffusion bonding; Nanolayer; Shear strength; IN-SITU COMPOSITES; MECHANICAL-PROPERTIES; CU-NI; MICROSTRUCTURE; TI; ALLOY; BEHAVIOR; OXIDATION; EVOLUTION; SYSTEM;
D O I：
10.1007/s40195-019-00906-2
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Diffusion bonding of refractory Nb-Si-based alloy was performed with Ni/Al and Ti/Al nanolayers under the condition of 1473K/30MPa/60min. The Nb-SS/Nb5Si3 in situ composite with the nominal composition of Nb-22Ti-16Si-3Cr-3Al-2Hf was used as the parent material. The joint microstructures were examined by using a scanning electron microscope equipped with an X-ray energy dispersive spectrometer. Shear test was conducted for the bonded joints at room temperature. Within the joint bonded with Ni/Al multilayer, element diffusion occurred between the base metal and the nanolayer, with the reaction products of AlNb2+Ni3Al, NiAl and AlNi2Ti phases. The average shear strength was 182MPa. While using Ti/Al multilayer, the interface mainly consisted of TiAl, (Ti,Nb)Al and (Ti,Nb)(2)Al phases, and the corresponding joints exhibited an increased strength of 228MPa. In this case, the fracture mainly took place in the TiAl phase and presented a typical brittle characteristic.
引用
收藏
页码：1142 / 1150
页数：9
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