Pask J A, Tomsia A P
Department of Materials Science and Mineral Engineering, University of California, Berkeley 94720.
J Dent Res. 1988 Sep;67(9):1164-71. doi: 10.1177/00220345880670090501.
Additives and/or impurities in NiCr alloys would be expected to affect the oxidation and adherence of dental glasses. Oxidation characteristics and bonding of several glasses to a commercial impure 80Ni20Cr alloy and laboratory-prepared purer alloys were thus studied at 1000 degrees C. The commercial alloy formed a porous and buckled single-layer oxide scale with lenticular voids at the interface. The scale was penetrated by glass which formed a chemical bond at the alloy/glass interface, resulting in excellent adherence with fracture in the glassy phase. The purer alloy formed a complex multilayer oxide scale to which the glass bonded but did not penetrate; the assembly was not satisfactory, since fracture occurred in the oxide scale.
预计镍铬合金中的添加剂和/或杂质会影响牙科玻璃的氧化和附着。因此，研究了几种玻璃在1000℃下与市售不纯80Ni20Cr合金以及实验室制备的较纯合金的氧化特性和结合情况。市售合金形成了一层多孔且起皱的单层氧化皮，界面处有透镜状空隙。玻璃穿透了氧化皮，并在合金/玻璃界面形成化学键，从而实现了极佳的附着，断裂发生在玻璃相中。较纯合金形成了复杂的多层氧化皮，玻璃与之结合但未穿透；这种组合并不理想，因为断裂发生在氧化皮中。
