ASTM E289 采用激光干涉测量刚性材料线膨胀系数标准测试方法

2014-09-06 10:44  下载量:34

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This test method covers the determination of linear thermal expansion of rigid solids using either a Michelson or Fizeau interferometer. For this purpose, a rigid solid is defined as a material which, at test temperature and under the stresses imposed by instrumentation, has a negligible creep, insofar as significantly affecting the precision of thermal length change measurements.

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