Single phase glass compositions for use in protective and lubric

Details Single phase glass compositions for use in protective and lubric Single phase glass compositions for use in protective and lubric

1981-07-01

1982-11-09

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

72 42, 148 27, 501 20, 501 21, B21B 4502, C03C 308

Patent

active

043585442

ABSTRACT:
The coatings are glass compositions which consist essentially of from 18 to 45 mol % of the alkaline oxides CaO and one or both of Na.sub.2 O and K.sub.2 O and from 5 to 22 mol % of Al.sub.2 O.sub.3, the balance being B.sub.2 O.sub.3 and SiO.sub.2 in such amounts that the molar ratio of B.sub.2 O.sub.3 : (B.sub.2 O.sub.3 +SiO.sub.2) lies in the range from 0.575:1 to 0.85:1. The molar ratio of K.sub.2 O: (K.sub.2 O+Na.sub.2 O) is from 0.4:1 to 0.6:1 and CaO is 48 to 52 mole % of the alkaline oxides.
These compositions are particularly suitable for use during the heat-treatment and hot-working of titanium and its alloys.

REFERENCES:
patent: 3140779 (1964-07-01), Dalton et al.
patent: 3840461 (1974-10-01), Espunes
patent: 4281528 (1981-08-01), Spiegelberg et al.
patent: 4291107 (1981-09-01), Barry et al.
Chemical Abstracts, vol. 87, 1977, p. 276, 87:57350q, (Japanese Published Patent Appln. 75/116322).
Chemisches Zentralblatt, vol. 209, 1964, Abstract No. 2007.

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