Influence of the Substrate Orientation on the Isothermal Solidification during TLP Bonding Single Crystal Superalloys

doi:10.1016/j.jmst.2013.11.013

J. Mater. Sci. Technol.

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Influence of the Substrate Orientation on the Isothermal Solidification during TLP Bonding Single Crystal Superalloys

Naicheng Sheng, Bo Li, Jide Liu, Tao Jin, Xiaofeng Sun, Zhuangqi Hu

Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2013-06-05 Revised:2013-06-24 Online:2014-03-15 Published:2014-03-17
Contact: J. Liu
Supported by:
National Basic Research Program (973 Program) of China under Grant Nos. 2010CB631200 and 2010CB631206, the National Natural Science Foundation of China (NSFC) under Grant Nos. 50971124,50904059, 51071165 and 51204156.

Abstract

Abstract:

Angle deviations between the two substrates during transient liquid phase (TLP) bonding single crystal superalloys cannot be avoided. In the present work, specimens have been prepared to investigate the influences of the various substrate orientations. It is found that the width of the non-isothermal solidification zone (NSZ) is linear with the square root of the isothermal solidification time. This suggests that the isothermal solidification process is B-diffusion controlled in different substrate orientation deviations. And also the width of the NSZ increases with increasing angle deviation, indicating that the isothermal solidification time needed in the TLP bonding increases with increasing orientation deviation between the two substrates.

Key words: Transient liquid phase (TLP) bonding, Single crystal superalloys, Orientation deviation, Bonding time

Naicheng Sheng, Bo Li, Jide Liu, Tao Jin, Xiaofeng Sun, Zhuangqi Hu. Influence of the Substrate Orientation on the Isothermal Solidification during TLP Bonding Single Crystal Superalloys[J]. J. Mater. Sci. Technol., DOI: 10.1016/j.jmst.2013.11.013.

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Influence of the Substrate Orientation on the Isothermal Solidification during TLP Bonding Single Crystal Superalloys

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