CAJ | 학술논문

为了降低航空发动机热端部件的温度,空气等离子喷涂已被广泛地应用.为确定热障涂层的残余应力、结合力、断裂韧性、疲劳裂纹扩展速率等性能和特性,需要知道其杨氏模量和泊松比.因为涂层厚度非常薄且使用时是结合在基体上的,所以需要一个能够在原处测量涂层的杨氏模量和泊松比的方法.采用等离子喷涂工艺在GH150高温合金上喷涂了MCrAlY和陶瓷层,利用一种改进的悬臂梁方法测量了热障涂层的杨氏模量和泊松比.这种无损测试方法为测定其他薄膜材料的杨氏模量和泊松比提供了借鉴.
위료강저항공발동궤열단부건적온도,공기등리자분도이피엄범지응용.위학정열장도층적잔여응력、결합력、단렬인성、피로렬문확전속솔등성능화특성,수요지도기양씨모량화박송비.인위도층후도비상박차사용시시결합재기체상적,소이수요일개능구재원처측량도층적양씨모량화박송비적방법.채용등리자분도공예재GH150고온합금상분도료MCrAlY화도자층,이용일충개진적현비량방법측량료열장도층적양씨모량화박송비.저충무손측시방법위측정기타박막재료적양씨모량화박송비제공료차감.
In gas turbines, thermal barrier coatings (TBCs) applied by air plasma spraying are widely used to lower the temperature of hot components. To analyze the characteristics of TBCs such as residual stress, bond strength, fracture toughness, and crack propagation ratio, the Young's modulus and Poisson's ratio are important parameters. For TBC is a brittle and thin film, it is desirable to evaluate those properties while the coatings are bonded to a substrate. An atmospheric plasma spray MCrAlY bond coat and Yttria stabilized zirconia (YSZ) top coat are deposited onto a nickel-base superalloy GH150 substrate. The Young's modulus and Poisson's ratio are measured by cantilever beam bending with NDI. The method will be developed to test the Young's modulus and Poisson ratio of other multilayer systems.