通常金属试件表面零厚度光栅在800～1 000 ℃下就发生氧化和低固溶点金属的溢出, 导致试件表面的光栅被完全覆盖, 无法继续测量。本文通过特殊的物理方法处理, 使试件表面光栅重新显现, 从而获得1 200 ℃下清晰的干涉条纹, 成功测试该温度下单晶材料的弹性模量和泊松比。

The zero-thickness grating of the metal specimen surface will be oxidized and overflowed by lowing melting point metals from 800 to 1000 ℃. The grating will be completely covered and cannot continues to be measured, A new special physical approach was proposed to reappear the grating, then the clear interference stripes were abtained at 1200℃. Young’s modulus and Poisson’s ratio of the high temperature alloys at 1 200 ℃ could be tesed.