John M Hazel, 57716 Jockey Hollow Rd, Morristown, NJ 07960

4233077, Nov 11, 1980

Apr 29, 1977

5/792422

John G. Hazel - Barberton OH

PPG Industries, Inc. - Pittsburgh PA

C04B 3564
C08J 320

106 43

Extrudable and injection-moldable blends of submicron refractory hard metal powders, i. e. , carbides, borides, and nitrides of Groups III-V metals, with solid plasticizers, e. g. , paraffin waxes or synthetic resins, are prepared by wetting the refractory powder with a solvent for the plasticizer, blending solvent-wetted powder with plasticizer at temperatures at which the resulting mixture is liquid, removing solvent from the mixture while blending is continued, and cooling the solvent-depleted mixture.

4275026, Jun 23, 1981

Nov 2, 1979

6/090840

John G. Hazel - Barberton OH
Roger A. Steiger - Canal Fulton OH

PPG Industries, Inc. - Pittsburgh PA

C04B 3558

264 67

Cold formed and sintered titanium diboride shapes of high density are prepared by grinding particulate carbothermic titanium diboride in a mill having non-contaminating grinding media in the presence of an inert, substantially oxygen-free liquid grinding aid to form finely-divided titanium diboride powder having a surface area of at least about 3 square meters per gram, cold forming the finely-divided titanium diboride powder into a desired shape and sintering the shape to produce a titanium diboride article having a density of at least 95 percent of the theoretical density of titanium diboride.