The experimental study of the effect of Be on the castability of alloy for porcelain-fused-to-metals

Objective: To investigate the effect of beryllium on the metal castability by comparing the castability of twokinds of alloy for porcelain-fused-to-metals. Methods: The effects of two investments on the castability were compared,through directly calculating the castability values of the two kinds of porcelain-fused-to-metals using net patterns. Results:There had no significant difference between Ni-Cr -Be alloys and Be-free alloys (P0.05) in their castability, both wereover 95%.Conclusion: The presence of Be in Ni-Cr alloys can not increase the castability of alloys. The two investmentshave no significant effect on the castability of the two kinds of porcelain-fused-to-metals.