Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...
Patent
1987-02-26
1988-09-20
Kittle, John E.
Stock material or miscellaneous articles
Self-sustaining carbon mass or layer with impregnant or...
428219, 428220, 428702, 428634, 373 88, 1062865, 1062871, 10628717, 10628734, B32B 900, H05B 7064, F23K 310
Patent
active
047725141
ABSTRACT:
A protective layer for carbonaceous materials, especially graphite electrodes, applied by plasma-coating method comprised of 65-98 .sup.w /o of metal aluminum, 1-20 .sup.w /o of combined metal silicon with silica (SiO.sub.l) and up to 15 .sup.w /o of oxygenous compounds of aluminum. The resistivity of the layer is 0.07.10.sup.-6 ohm.m up to 0.3.10.sup.-6 ohm.m at 20.degree. C. and 0.12.10.sup.-6 ohm.m up to 0.7.10.sup.-6 ohm.m at 400.degree. C.
The method of producing the protective layer comprises the following steps of directing a plasma flame of a water stabilized plasma burner toward the carbonaceous material, and feeding into a plasma flame a particulate composition comprising between about 85 .sup.w /o to about 99 .sup.w /o of metallic aluminum having a particle size of between about 0.09 to about 0.180 mm and between about 1 to about 15 .sup.w /o of silicon having a particle size of between about 0.07 to about 0.165 mm.
REFERENCES:
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patent: 3348929 (1967-10-01), Valtschev et al.
patent: 3553010 (1971-01-01), Rubisch
patent: 3669723 (1972-06-01), Parr et al.
patent: 4386112 (1983-05-01), Eaton et al.
Forejt Antonin
Kasik Pavel
Macku Ales
Neufuss Karel
Ceskoslovenska akademie ved
Kittle John E.
Rucker Susan S.
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