The sample from the meteorite was far too small to test for hardness, except to show that it is certainly harder than regular diamonds.
如果要检测硬度，陨石的标本就太小，它只能显示出这种物质无疑比一般钻石硬。
Hardness, tensile strength, breaking elongation ratio and aging property of samples were tested and surface of sample after aging was represented by SEM.
对试样进行了硬度、拉伸强度、断裂伸长率、热老化等性能试验；对老化后的试样表面进行了SEM表征。
In some cases, in order to get the highest possible sample hardness, the sample may be subjected to heat treatment before polishing.
在某些情况下，为了使试样得到尽可能高的硬度，在抛光前试样可进行热处理。
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