Mahler D B, Adey J D, Marshall S J
J Dent Res. 1987 Jun;66(6):1146-8. doi: 10.1177/00220345870660061001.
When aged at 37 degrees C for six months, dental amalgam exhibits a marked decrease in the property of creep. The objective of this study was to investigate the relationship between this decrease in creep and selected metallurgical characteristics. The formation of beta 1 (Ag-Hg), the grain size of gamma 1 (Ag-Hg), and the composition of gamma 1 were chosen for investigation. Creep was determined according to ADA Specification test No. 1, beta 1 was measured by x-ray diffraction, and gamma 1 grain size and gamma 1 composition were determined by electron-probe microanalysis. The results showed that the decrease in creep was related to beta 1 formation and not to changes in either gamma 1 grain size or gamma 1 composition.
在37摄氏度下老化6个月后，牙科汞合金的蠕变性能显著下降。本研究的目的是调查这种蠕变下降与选定的冶金特性之间的关系。选择β1（Ag-Hg）的形成、γ1（Ag-Hg）的晶粒尺寸和γ1的成分进行研究。根据ADA规范试验No.1测定蠕变，通过X射线衍射测量β1，通过电子探针微分析测定γ1晶粒尺寸和γ1成分。结果表明，蠕变的下降与β1的形成有关，而与γ1晶粒尺寸或γ1成分的变化无关。
