Abstract:
An improved sealing mechanism for a turbomachine such as a compressor for a gas turbine engine employs an abradable coating with a solid lubricant and metal alloy having a quasicrystalline phase.
Abstract:
A coating composition for ferrous metal alloy surfaces comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding aluminum powder to form the slurry. The bonding solution preferably also contains magnesium. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates to neutralize the bonding solution prior to formation of the slurry.
Abstract:
A coating composition comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. The bonding solution advantageously contains a relatively small but essential amount of vanadium pentoxide and, preferably, magnesium. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding aluminum powder to form the slurry. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates.
Abstract:
A seal coat composition comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and iron oxide (Fe.sub.2 O.sub.3) powder. The bonding solution advantageously contains a relatively small but essential amount of vanadium pentoxide and, preferably, magnesium. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding iron oxide powder to form the slurry. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates to neutralize the bonding solution prior to formation of the slurry.
Abstract translation:密封涂料组合物包含基本上由铝中和磷酸盐粘合溶液和氧化铁(Fe 2 O 3)粉末组成的浆料。 粘合溶液有利地包含相对小但必要量的五氧化二钒,优选含有镁。 用于形成涂布浆料的粘合溶液成分的方法包括在添加氧化铁粉末之前,用少量但受控并且必需量的溶质铝平衡磷酸盐水溶液以形成浆料。 本发明克服了在形成浆料之前需要环境不利的铬酸盐或钼酸盐中和粘合溶液的粘合溶液的问题。