公开(公告)号：US20050260434A1

公开(公告)日：2005-11-24

申请号：US10847357

申请日：2004-05-18

申请人： Warren Nelson ,  Jon Schaeffer ,  Sharon Swede ,  David Bucci ,  Joseph Debarro ,  Terry Strout ,  Tyrone Mortensen

发明人： Warren Nelson ,  Jon Schaeffer ,  Sharon Swede ,  David Bucci ,  Joseph Debarro ,  Terry Strout ,  Tyrone Mortensen

IPC分类号： F01D5/28 ,  C23C4/04 ,  C23C4/08 ,  C23C4/12 ,  C23C28/00 ,  F02C7/00 ,  B32B15/04

CPC分类号： C23C28/325 ,  C23C4/18 ,  C23C26/00 ,  C23C28/3215 ,  C23C28/3455 ,  Y02T50/67 ,  Y10T428/12479 ,  Y10T428/12569 ,  Y10T428/12611 ,  Y10T428/12736 ,  Y10T428/12847 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/31681

摘要： A bi-layer bond coating for use on metal alloy components exposed to hostile thermal and chemical environment, such as a gas turbine engine used to generate electricity and the method for applying such coatings. The preferred coatings include a bi-layer bond coat applied to the metal substrate, with both layers being applied using high velocity oxy-fuel (HVOF) thermal spraying. In one embodiment, bond coatings in accordance with the invention can be used in combination with a thermal barrier coating (“TBC”). However, the invention can also take other forms, such as a stand alone overlay coating. Bi-layer bond coatings in accordance with the invention consist of a dense first inner layer (such as iron, nickel or cobalt-based alloys) that provides oxidation protection to the metal substrate, and a second outer layer having controlled porosity that tends to promote roughness, mechanical compliance, and promotes adherence of the TBC. Preferably, the outer, less dense layer of the bi-layer bond coat is formed from a mixture of metallic powder and polyester to adjust and control the porosity, but without sacrificing mechanical compliance. Together, the layers enhance adherence to the substrate and improve the overall life of the coating system.

摘要翻译： 用于暴露于恶劣的热和化学环境的金属合金部件的双层粘合涂层，例如用于发电的燃气涡轮发动机和施加这种涂层的方法。 优选的涂层包括施加到金属基底上的双层粘合涂层，其中使用高速氧 - 燃料（HVOF）热喷涂施加两层。 在一个实施方案中，根据本发明的粘合剂涂层可以与热障涂层（“TBC”）组合使用。 然而，本发明也可以采取其它形式，例如独立覆盖涂层。 根据本发明的双层粘合涂层由致密的第一内层（例如铁，镍或钴基合金）组成，其向金属基底提供氧化保护，以及具有趋向促进的受控孔隙率的第二外层 粗糙度，机械依从性，并促进TBC的坚持。 优选地，双层粘合涂层的外部，较不致密的层由金属粉末和聚酯的混合物形成，以调节和控制孔隙率，但不牺牲机械顺应性。 这些层一起增强了对基材的粘附性并提高了涂层体系的总体寿命。