The combustion chemical vapor deposition of high temperature materials

Combustion chemical vapor deposition (combustion CVD) has been used to depo sit a number of different high temperature oxide coatings. including Al2O3, Cr2O3, SiO2, CeO2, some spinel oxides (MgAl2O4, NiAl2O4), and yttria stabi lized zirconia (YSZ). The materials presented in this paper were selected b ecause of their intrinsic merit as protective materials at elevated tempera ture. This paper reviews the technique of combustion CVD, and summarizes bo th the methods used and key results from high temperature materials which h ave been deposited using this technique. The ability of Al2O3, Cr2O3, and S iO2 to provide oxidation protection to a prototypical superalloy substrate, Ni-20Cr, is reported, using thermogravimetric analysis (TGA) to quantify t he alloy's oxidation response; all three coatings reduce the oxidation kine tics of Ni-20Cr. (C) 1999 Elsevier Science S.A. All rights reserved.