Products having single phases or solid solutions of the formula M2R1X1 wherein M is transition metal, R is one or more of Si, Al, Ge, Pb, Sn, Ga, P, S, In, As, Tl or Cd, and X is one or more of B, C or N can be prepared by subjecting a powdered mixture containing M, R and X to a temperature of about 1000 °C to about 1800 °C, preferably under a pressure of about 5 MPa to about 200 MPa. The products so formed have excellent machinability. The products may also be present as composites, preferably composites which are in thermal equilibrium with the single phase or solid solutions of the formula M2R1X1.
展开▼
