Microstructure evolution and formation mechanism of laser-ignited SHS joining between Cf/Al composites and TiAl alloys with Ni-Al-Ti interlayer

被引：6

作者：

Feng, Guang-Jie ^{[1
]}

Li, Zhuo-Ran ^{[1
]}

Feng, Shi-Cheng ^{[1
]}

Zhang, Wei-Jie ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China

来源：

RARE METALS | 2017年 / 36卷 / 09期

基金：

中国国家自然科学基金;

关键词：

SHS; Joining; Microstructure; Formation mechanism; Ni-Al-Ti interlayer; HIGH-TEMPERATURE SYNTHESIS; FABRICATION; VACUUM; CERMET; HEAT;

D O I：

10.1007/s12598-015-0542-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, C-f/Al composites and TiAl alloys were joined by a new method named laser-ignited self-propagating synthesis (SHS). Mixed powders of 63.0Ni-31.9Al-5.1Ti (wt%) were used as joining interlayer. Perfect joint was got. The microstructure evolution and formation mechanism of the SHS joint were investigated by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Results show that localized melting occurs on both sides. One gamma-Ni0.35Al0.30Ti0.35 and two Ni-Al reaction layers form, respectively, in the TiAl/interlayer and C-f/Al/interlayer interfaces. The combustion of Ni-Al-Ti interlayer begins with the sharp reaction of Ni and Al. The interlayer product is a eutectic organization of NiAl and Al-rich gamma.

引用

页码：746 / 752

页数：7

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