C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/11, 25/132, 5
C01B 35/04 (2006.01) C04B 35/58 (2006.01)
Patent
CA 1329695
HIGHLY REACTIVE SUB-MICRON AMORPHOUS TITANIUM DIBORIDE POWDER AND PRODUCTS MADE THEREFROM ABSTRACT A material of manufacture comprising sub-micron particulate amorphous titanium diboride formed by a process which comprises the steps of forming a powdered reaction mixture of titanium oxide, boron oxide and magnesium, exothermically reacting the reaction mixture in an atmosphere including air to yield a reacted mass containing titanium diboride and magnesia, leaching the reacted mass with a leaching solution having a pH in the range of about 0.5 to about 8, and recovering from the leaching solution sub-micron titanium diboride having a surface area of from about 25 to about 49 m2/gm; and a material of manufacture resulting from the hot pressing of the sub-micron particulate titanium diboride material of this invention which has a hardness of from about 2800 to about 3400 Knoop, an elastic modulus from about 700 to about 813 GPa, a forming temperature of from about 1500°C or less, and a grain morphology aspect ratio of from about 2:1 to about 100:1.
609745
Finlayson & Singlehurst
Georgia Tech Research Corporation
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