M3B2 and M5B3 Formation in Diffusion-Affected Zone During Transient Liquid Phase Bonding Single-Crystal Superalloys

被引：0
|
作者：
Naicheng Sheng
Xiaobing Hu
Jide Liu
Tao Jin
Xiaofeng Sun
Zhuangqi Hu
机构：
[1] Chinese Academy of Sciences,Superalloys Division, Institute of Metal Research
[2] Chinese Academy of Sciences,Shenyang National Laboratory for Materials Science, Institute of Metal Research
来源：
Metallurgical and Materials Transactions A | 2015年 / 46卷
关键词：
Boride; Orientation Relationship; Duplex Stainless Steel; Transient Liquid Phase; Isothermal Solidification;
D O I：
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中图分类号：
学科分类号：
摘要：
Precipitates in the diffusion-affected zone (DAZ) during transient liquid phase bonding (TLP) single-crystal superalloys were observed and investigated. Small size and dendritic-shaped precipitates were identified to be M3B2 borides and intergrowth of M3B2/M5B3 borides. The orientation relationships among M3B2, M5B3, and matrix were determined using transmission electron microscope (TEM). Composition characteristics of these borides were also analyzed by TEM energy-dispersive spectrometer. Because this precipitating phenomenon deviates from the traditional parabolic transient liquid phase bonding model which assumed a precipitates free DAZ during TLP bonding, some correlations between the deviation of the isothermal solidification kinetics and these newly observed precipitating behaviors were discussed and rationalized when bonding the interlayer containing the high diffusivity melting point depressant elements and substrates of low solubility.
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页码：1670 / 1677
页数：7
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