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将稀土相ErSn3分别暴露于空气与真空环境中,研究在时效处理过程中ErSn3表面Sn晶须的生长情况。结果表明:大气环境中,在稀土相ErSn3的表面出现了Sn晶须的生长现象,且室温条件下Sn晶须的分布不均,生长速度慢,而高温条件下Sn晶须的分布均匀,生长速度快;真空环境中,在稀土相ErSn3的表面未出现Sn晶须的生长现象。由于在大气环境中稀土相ErSn3发生了氧化,氧原子向ErSn3晶格内部的扩散引起的体积膨胀提供了Sn晶须生长的驱动力,因此,大气环境中在ErSn3的表面会出现Sn晶须的生长现象,而真空环境中则不会出现。
The ErSn3 rare earth phase were exposed to air and vacuum environment, the aging process of ErSn3 Sn whiskers growth. The results show that Sn whiskers grow on the surface of ErSn3 in the atmosphere, and the distribution of Sn whiskers is not uniform and the growth rate is slow at room temperature, while the growth of Sn whiskers under high temperature Speed; In a vacuum environment, the growth of Sn whiskers did not appear on the surface of rare earth phase ErSn3. Due to the oxidation of the rare-earth phase ErSn3 in the atmosphere, the volume expansion caused by the diffusion of oxygen atoms into the ErSn3 lattice provides the driving force for the growth of Sn whiskers. Therefore, Sn whiskers appear on the surface of ErSn3 in the atmosphere Growth phenomenon, but not in a vacuum environment.