Investigation of Ni-B Alloys for Joining of TiB2 Ultra-High-Temperature Ceramic
Investigation of Ni-B Alloys for Joining of TiB2 Ultra-High-Temperature Ceramic
复制标题
DOI：
10.1007/s11665-016-1958-y
复制
发表时间：
2016-02
影响因子：
2.3
通讯作者：
L. Xi;L. Xi;I. Kaban;R. Nowak;G. Bruzda;N. Sobczak;M. Stoica;J. Eckert
中科院分区：
文献类型：
--
作者：
L. Xi;L. Xi;I. Kaban;R. Nowak;G. Bruzda;N. Sobczak;M. Stoica;J. Eckert
研究了ni83b17和ni50b50合金分别加热至1105℃和1050℃时在tib2陶瓷上的熔化和润湿行为。两种合金在初熔后立即在tib2基体上表现出很好的润湿性。液相ni50b50合金不溶解TiB2，而是沿晶界渗透到陶瓷中。ni83b17合金在TiB2上加热熔化后，少量陶瓷析出，形成三元ni21ti2b6相。Ni83B17/ tib2界面存在多个微裂纹，而Ni50B50/ tib2结合良好，无界面微裂纹。
Melting and wetting behavior of Ni83B17and Ni50B50alloys on TiB2ceramic are investigated upon heating to 1105 and 1050 °C, respectively, using the sessile drop technique. Both alloys show a very good wetting on the TiB2substrates immediately after incipient melting. Liquid Ni50B50alloy is revealed not to dissolve TiB2, but penetrates along the grain boundaries into the ceramic. Upon heating and melting of the Ni83B17alloy on TiB2, a small amount of ceramic is dissolved and the ternary Ni21Ti2B6phase is formed. Whereas multiple microcracks are observed at the Ni83B17/TiB2interface, the Ni50B50/TiB2couple is well bonded and free of interfacial microcracks.