Thermal Cycle Properties of Plasma Sprayed Oxidation-Resistant Metallic Coatings
Thermal Cycle Properties of Plasma Sprayed Oxidation-Resistant Metallic Coatings
复制标题
等离子喷涂抗氧化金属涂层的热循环性能
DOI：
10.4028/www.scientific.net/msf.696.296
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
F. Ono
中科院分区：
文献类型：
--
作者：
S. Takahashi;Masaki Hatano;Y. Kojima;Y. Harada;A. Kawasaki;F. Ono
根据日本工业标准抗氧化金属涂层耐热循环性测试方法（JIS H 8452：2008），研究了空气等离子喷涂Ni-20 Cr、Ni-50 Cr和CoNiCrAlY涂层的耐热循环性。将样品暴露于循环加热和冷却方案，该方案包括在空气中加热至1000 °C或1093 °C，然后冷却的多达100个循环。抗氧化金属涂层的热循环阻力被发现强烈地依赖于测试温度和涂层材料的化学组成。在1000 °C下的热循环测试中，在任何样品中均未观察到显著失效。然而，在1093 °C下的热循环测试中，在Ni-20 Cr涂层的整个表面上观察到剥落，尽管Ni-50 Cr和CoNiCrAlY涂层甚至在暴露于100次热循环时也表现出优异的耐热循环性。CoNiCrAlY涂层的热喷涂颗粒飞溅之间的优先氧化，由于热循环次数的增加，表现出质量增益。此外，还利用SEM、XRD、EPMA等手段对试样的破坏行为进行了详细的研究。
Thermal cycle resistance of Ni-20Cr, Ni-50Cr and CoNiCrAlY coatings produced by air plasma spraying was investigated according to Japanese Industrial Standard Testing method for thermal cycle resistance of oxidation resistant metallic coatings (JIS H 8452: 2008). The specimens were exposed to a cyclic heating and cooling regimen comprised of up to 100 cycles of 10 hours heating to 1000 °C or 1093 °C in air followed by cooling. The thermal cycle resistance of oxidation-resistant metallic coatings was found to depend strongly on testing temperature and on the chemical composition of the coating materials. In thermal cycle testing at 1000 °C, no remarkable failure was observed in any specimen. However, in thermal cycle testing at 1093 °C, spalling was observed over the entire surface of the Ni-20Cr coating, although the Ni-50Cr and the CoNiCrAlY coatings exhibited excellent thermal cycle resistance even upon exposure to 100 thermal cycles. The CoNiCrAlY coating showed mass gain with increasing number of thermal cycles due to preferential oxidation between thermal spray particle splats. Furthermore, the failure behavior of specimens was investigated in detail by SEM, XRD, EPMA, etc.