A novel silicon-based micron/nanometer structural composite system, silicon nanoporous pillar array(Si-NPA), was prepared on the substrate of single-crystal silicon (sc-Si) wafers by a hydrothermal etching method; and the studies on its morphological structural and optical properties were carried out.

Several novel preparation methods of the porous silicon such as electrochemical methods, photochemical method, etching method and hydrothermal etching method are introduced in detail.

Effects of sputtered TiAlCr coatings on hot corrosion resistance of TiAl intermetallics in molten sulphate;

Oxidation and hot corrosion behavior of a composite MCrAlY/enamel coating;

Structure and high temperature hot corrosion of palladium modified aluminide coatings on nickel-base superalloy;