Composite ceramic articles and method of making

Stock material or miscellaneous articles – Composite – Of quartz or glass

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106 55, 106 65, 106 69, 106 732, 156 89, 428538, 428539, 428446, 428448, B32B 904, C04B 3518, C04B 3550

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active

039938441

ABSTRACT:
Ceramic bodies coated or joined to one another with ceramic eutectic compositions of alumina, silica and rare earth oxides melting below 1600.degree. C are described. An exemplary composition contains about 20 weight percent alumina, 58 weight percent silica, and 22 weight percent yttria. Composite structures of such bodies exhibit good to excellent thermal shock resistance, resistance to chemical attack, and joint strengths between bodies and coatings or between various silica, alumina and rare earth oxide based ceramics joined together or to each other.

REFERENCES:
patent: 3359210 (1967-12-01), Jaffe
patent: 3503894 (1970-03-01), Wachtel
patent: 3673049 (1972-06-01), Giffen et al.
patent: 3719550 (1973-03-01), Arendt
patent: 3833389 (1974-09-01), Komeya et al.
I. A. Bondar et al. Phase Equilibriums in the Y.sub.2 O.sub.3 Al.sub.2 O.sub.3, SiO.sub.2 Systems, Izv. AKad. Nauk. SSSR Ser. Khim pp. 1325-1326 vol. 7--1964.
Bondar et al., Izv. Akad. Nauk. SSSR Ser. Khim 1964(7) 1325-1326 (cited from Chem. Abs. vol. 64, 1966 16708g.

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