C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/103
C23C 8/16 (2006.01) H01J 9/04 (2006.01) H01J 9/14 (2006.01)
Patent
CA 1175309
PHN 9742 -7- 11.07.1980 ABSTRACT: "Method of providing a metal component with a thermally black surface". It is possible to make a metal from the group molybdenum, nickel, iron, tungsten and copper or an alloy comprising at least one metal from this group, thermally black (black for thermal radiation) and very resistent at high temperatures. This can be done by successive- ly coating this metal or the alloy with a layer of aluminium which is from one to a few /µm thick, heating the metal or the alloy thus coated in a non-reactive atmosphere until the aluminium has reacted with the metal or a metal from the alloy, after which the metal or the alloy is fired in wet hydrogen so that the aluminium is partially oxidized from the compound of the aluminium with the metal or the alloy. In this manner a thermally black surface which can withstand very high temperatures is obtained.
377028
Koninklijke Philips Electronics N.v.
Van Steinburg C.e.
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