Boride-based refractory materials

Details Boride-based refractory materials Boride-based refractory materials

1979-10-30

1981-03-31

Peters, G. O.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 59, 106 65, 106 733, C04B 3558

Patent

active

042591198

ABSTRACT:
A novel high strength, high heat resistance sintered body suitable for use as refractory and abrasive materials is proposed. The sintered body comprises from 99.99 to 70% by weight of a combination of at least two kinds of metal diborides selected from the group consisting of diborides of Ti, Ta, Cr, Mn, Mo, Y, V, Hf, Nb, Al and Zr and from 0.01 to 30% by weight of a metal boride or borides selected from the group consisting of borides of nickel, iron and cobalt.
The sintered body of the invention can be prepared by sintering the powdery mixture of the components at a relatively low temperature of 1800.degree. C. or lower and has a bending strength as high as 190 kg/mm.sup.2 and a Vickers hardness of 3300 kg/mm.sup.2 at room temperature and 2400 kg/mm.sup.2 at 1000.degree. C.

REFERENCES:
patent: 2802748 (1957-08-01), Glaser
"Preparation and Evaluation of Diborides;" Bureau of Miner R.I. 6407; Dept. f Interior, Bureau of Mines, 1964.

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