| 单词 | scratch hardness |
| 释义 | > as lemmasscratch hardness scratch hardness n. the hardness of a metal or mineral as estimated by measuring the width of a scratch made on the material by a diamond point under a specified load. ΘΚΠ the world > the earth > minerals > mineral structure or appearance > [noun] > hardness hardness1672 scratch hardness1928 society > occupation and work > materials > derived or manufactured material > metal > qualities of metals > [noun] > other qualities rust resistance1892 slaglessness1902 scratch hardness1928 superplasticity1946 1928 Jrnl. Iron & Steel Inst. 117 893 Annealing these cold-rolled single crystals at 250°C..gave no measurable rise of scratch hardness. 1962 R. Webster Gems II. 488 For the gemmologist, scratch hardness, based on the standard minerals in Mohs's list, is the only practical basis for experiment. 1972 Jrnl. Physics D 5 1293 Scratch hardness measurements reflect a greater degree of anisotropy in the properties of crystals than the corresponding indentation techniques. < as lemmas |
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