Refractory boat and method of manufacture

Details Refractory boat and method of manufacture Refractory boat and method of manufacture

1995-09-06

1997-02-18

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 75235, 75244, C04B 35583

Patent

active

056041640

ABSTRACT:
A refractory boat formed from an intermetallic composite comprising titanium diboride and boron nitride or titanium diboride, boron nitride and aluminum nitride and further including a metal selected from molybdenum, tungsten, tantalum and niobium and an oxide of CaO or Y.sub.2 O.sub.3 with the minimum concentration of oxide of from 0.7 wt % and with a maximum combined concentration of metal and oxide not exceeding 20 wt %. The invention is also directed to a method for forming a hot pressed refractory boat of an intermetallic composite composition as indicated above which is hot pressed at about 1900.degree. C.

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