研究了高温合金IN738及其溅射纳米晶涂层的抗循环氧化行 为，结果表明：纳米晶涂层在950℃的抗循环氧化性能比铸态合金好,纳米晶涂层氧化时形成 双层的外氧化膜，其内层为连续的Al2O3氧化层，具有较好的保护性和粘附性，提高了 合金抗循环氧化性能.
The cyclic oxidation behavior of IN738 alloy and it s nanocrystalline coating has been studied. The results indicated that the cycli c oxidation resistance of nanocrystalline coating was better than that of IN738 alloy at 950℃.The oxidation of nanocrystalline coating formed a double externa l oxide scale without internal oxide or nitride. The scale consisted of an outer part of Cr2O3 and spinel and an inner part of a continuous Al2O3 scale, which offered good adhesive and protectiveness. Thus,the cyclic oxidation resi stance of the coated IN738 alloy was significantly improved.
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