Dental alloy based on nickel - contains chromium, molybdenum, silicon, boron and cerium, and has good strength, ductility, colour and melting properties

摘要

Dental alloy used to make crowns or bridges which must blend with porcelain, and contg. by wt. 0.03% max. c; 0.02% max. Mn; 0.5% Fe; 3.7-4.2% Si; 19-20. 5% Cr; 5.5-6.5% Mo; 0.5-1.0% B; 0.2-0.8% Ce; and balance Ni. After baking with porcelain, this alloy pref. has a min. 0.2% proof stress in N/mm2 (PS) of 350; an elongation (d5) at fracture of min. 3.5%; and a hardness (Hv10) of max. 300. The new alloy contains no Be, which is toxic, and forms a light-coloured oxide skin due to the Ce content. The good meltability is due to the presence of B and Ce, and the absence of Al.