Method for producing an inlet lining

Abstract

The invention relates to a method for producing an inlet lining on a stator-sided component of a turbine engine, in particular, a gas turbine, with at least the following steps: a) providing a stator-sided component of a turbine engine, this component being provided with an inlet lining; b) providing a mixture consisting of a solvent; particles of a metallic parent material for the inlet lining, said particles being insoluble in the solvent; and a filler, this filler having at least one constituent that is soluble in the solvent; c) applying the mixture to the stator-sided component; d) drying the stator-sided component and the mixture, applied to the component, while at least partially expelling the solvent in order to provide a porous green body in the area of the applied and dried mixture; e) diffusion heat treating the component for inwardly diffusing aluminum and/or chromium and for forming the intermetallic phases in the resulting inlet lining.

1 . A method for producing an inlet lining on a stator-sided component of a turbine engine, in particular, a gas turbine, with at least the following steps:
 a) providing a stator-sided component of a turbine engine, this component being provided with an inlet lining;   b) providing a mixture consisting of a solvent; particles of a metallic parent material for the inlet lining, said particles being insoluble in the solvent; and a filler, the filler having at least one constituent that is soluble in the solvent;   c) applying the mixture to the stator-sided component;   d) drying the stator-sided component and the mixture, applied to the component, while at least partially expelling the solvent in order to provide a porous green body in the area of the applied and dried mixture;   e) diffusion heat treating the component for inwardly diffusing aluminum and/or chromium and for forming the intermetallic phases in the resulting inlet lining.   
   
   
       2 . The method of  claim 1 , wherein said providing a mixture step further comprises introducing an additional substance, insoluble in the solvent, into the mixture, the additional substance being decomposed and/or burned off during the diffusion heat treatment in order to create a macro-porosity in the resulting inlet lining. 
   
   
       3 . The method of  claim 2 , wherein the additional substance is one of polyester and polyimide. 
   
   
       4 . A method as in any either of  claims 1  or  2 , wherein said providing a mixture step further comprises introducing ceramic particles into the mixture, said ceramic particles being insoluble in the solvent. 
   
   
       5 . The method of  claim 4 , wherein the ceramic particles are composed of at least one of hexagonal boron nitride, graphite, clay mineral, calcium oxide and magnesium oxide. 
   
   
       6 . The method of  claim 5 , wherein nickel carbide particles are used as the parent material for the inlet lining in the mixture and the ceramic particles are composed of graphite. 
   
   
       7 . The method of  claim 5 , wherein nickel chromium aluminum particles are used as the parent material for the inlet lining in the mixture, and the ceramic particles are composed of clay mineral. 
   
   
       8 . The method of  claim 5 , wherein the parent material is at least one of nickel-based alloy particles, aluminum based alloy particles and cobalt based alloy particles, and the ceramic particles are composed of hexagonal boron nitride. 
   
   
       9 . The method of  claim 1 , wherein said mixture is provided as a highly liquid slip and is applied by immersion or spraying. 
   
   
       10 . The method of  claim 1 , wherein said mixture is provided as a viscous paste and is applied by brushing. 
   
   
       11 . The method of  claim 1 , wherein said mixture is provided as a highly viscous, tape-like molded article and is applied by cementing. 
   
   
       12 . The method of  claim 1 , wherein said drying takes place at a maximum temperature of 100 degrees Celsius. 
   
   
       13 . The method of  claim 12 , wherein said drying takes place around room temperature. 
   
   
       14 . The method of  claim 1 , wherein, while expelling at least partially the solvent, a micro-porosity is provided in the area of the applied and dried mixture. 
   
   
       15 . The method of  claim 1 , wherein during the diffusion heat treatment of the component beta nickel aluminum is formed as the intermetallic phase.