| 摘要 |
1383343 Enamelling metals UNION CARBIDE CORP 24 March 1972 [25 March 1971] 13982/72 Heading C1M [Also in Division C7] A sintered porous metal structure, e.g. abradable seals for turbines, which has been formed by coating a substrate with layers of binder and metal powder (preferably Ni, Cr or their alloys) and sintering, is coated with SiO 2 , Al 2 O 3 , TiO 2 or Cr 2 O 3 . In an example, an alcohol suspension of 100 parts SiO 2 based frit, 40 parts TiO 2 , 3 parts Cr 2 O 3 , 6 parts green label clay and # part Si 3 N 4 was applied to the sintered structure and heated at 1250‹ C. in a N 2 atmosphere to form a fused glass coating. |
