公开(公告)号：EP2683847A1

公开(公告)日：2014-01-15

申请号：EP12712339.6

申请日：2012-03-07

申请人： Snecma Société Anonyme ,  Centre National de la Recherche Scientifique CNRS ,  Institut National Polytechnique De Toulouse ,  Universite Paul Sabatier Toulouse III - Upst III

发明人： HUGOT, Juliette ,  BOIDOT, Mathieu ,  MONCEAU, Daniel ,  OQUAB, Djar ,  ESTOURNES, Claude

IPC分类号： C23C24/08 ,  C23C28/00

CPC分类号： F01D25/08 ,  B05D3/068 ,  C23C24/082 ,  C23C28/321 ,  C23C28/3455 ,  C23C28/36 ,  F01D5/288 ,  Y02T50/67 ,  Y10T428/12458 ,  Y10T428/12549

摘要： The present invention aims to produce a metal part equipped with a protective system, in particular for an aircraft engine turbine blade, having an improved thermal barrier in terms of thermal properties, adhesion to the part and resistance to oxidation/corrosion. In order to do this, the process of the invention produces, from particular ceramics, coating layers according to SPS technology in a single step. According to one embodiment, a metal part is produced according to an SPS flash sintering process and comprises a superalloy substrate (22), a metal sublayer (21), a TGO oxide layer (25), and the thermal barrier (23) formed by said process from at least two layers made of ceramic (2a, 2b), which are chemically and thermally compatible. A first ceramic (2a) referred to as an inner ceramic, is capable of having a substantially higher expansion coefficient. The outer ceramic (2b) is capable of having at least a lower thermal conductivity, a substantially higher sintering temperature and/or maximum operating temperature. The thermal barrier (23) has a gradient of composition, of porosity (3) from the metal sublayer (21) to the outer ceramic (2b).

摘要翻译： 一种用于通过在叠加在外壳内的金属部分来PLC机层生产通过快速烧结的保护材料的热处理在生产用于保护由超合金的金属部分的多层系统的热障方法。 该层含有，在一个超合金基材，基于锆的耐火陶瓷中的至少两个层。 的金属部分中产生雅丁到PLC闪光烧结法，包含一个超合金基材，金属子层，TGO氧化物层以及由该方法形成的热屏障。 第一陶瓷是一个内陶瓷设计为具有显着更高的膨胀系数。 外陶瓷被设计成具有至少更低的导热性，和烧结温度或最高工作温度中的至少一个也基本上是较高的。 热障具有从金属子层的外陶瓷的组合物和孔隙率梯度。