ZrO_2基热障涂层陶瓷材料研究进展

Progress in ZrO_2-Based Ceramic Materialsfor Thermal Barrier Coatings

由于ZrO2基陶瓷材料在热障涂层上的广泛应用,本文综述了氧化物(一元、二元、多元)稳定ZrO2、MZrO3化合物及Ln2Zr2O7化合物的研究情况。结果指出氧化物稳定ZrO2在热障涂层上的应用空间已十分有限,随着航空发动机技术的发展,化学式为A32+B24+O7焦绿石结构的陶瓷材料有望替代YSZ,根据声子导热理论和晶体化学原理,用稀土元素离子对A32+B24+O7型陶瓷材料进行掺杂进一步降低其热导率,将为热障涂层技术应用开辟广阔的空间。该机理对MZrO3同样适用。

In view of the extending useness of ZrO2-based ceramic materials on thermal barrier coatings, the research status of ZrO2 doped with oxides（ one type, two types and multitype） , compounds of MZrO3 and Ln2Zr2O7 are summarized in this paper. It is pointed out that the application range of ZrO2 stabilized with different oxides on thermal barrier coatings is limited. With the development of aero turbine engines technology, the pyrochlore structure ceramics materials with chemistry formula of A2^3＋B2^4＋O7 may substitute zirconia stabilized by yttria. And according to the theory of phonon thermal conduction and principle of crystal chemistry, by doping the A2^3＋B2^4＋O7 ceramic materials with rare earth oxides in order to reduce their thermal conductivity, a wide space for the application of thermal barrier coatings technology will be opened up. This method is applicable to MZrO3 as well.