A New Dental Superalloy System: V. Embrittling Phase Transformations

¹ School of Dental Medicine, University of Connecticut, Farmington, Connecticut 06032, USA and School of Dentistry, University of Michigan, Ann Arbor, Michigan

The -phase is rich in T^a. When the T^a concentration is less than 14%, -does not interfere with the slip mechanism; when the T^a concentration is more than 15%, -interferes with the slip mechanism. The coherent -Co₃T^a phase forms at T^a concentrations of less than 15%, whereas incoherent -Co₂T^a forms only at higher T^a concentrations. The interface between and the matrix is an important factor in the failure mechanism.