Abstract Al and Al/NiCrAlY coatings were deposited on pure titanium substrate by air plasma spraying method. Cyclic oxidation behavior and oxide scale adhesion at 800 °C for 100 cycles were investigated. For the single Al coating, a severe spalling of oxide scale and elemental interdiffusion occurred after 100 cycles. The mass loss of the single Al coating has reached to 1.39 mg/cm2. The oxide scale on the duplex Al/NiCrAlY coating kept a good bonding with the underlay coating. The addition of NiCrAlY layer inhibited the outward diffusion of Ti atoms and inward diffusion of Al atoms. The propagation of cracks and the formation of pores were also suppressed by NiCrAlY layer. As a result, the duplex Al/NiCrAlY coating possessed a superior cyclic oxidation resistance.

中文翻译：

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Al/NiCrAlY涂层在纯钛合金上的循环氧化行为及氧化皮附着力

摘要 采用空气等离子喷涂法在纯钛基体上沉积了Al和Al/NiCrAlY涂层。研究了 800 °C 下 100 次循环的循环氧化行为和氧化皮附着力。对于单个铝涂层，在 100 次循环后发生了严重的氧化皮剥落和元素相互扩散。单个铝涂层的质量损失已达到 1.39 mg/cm2。双相Al/NiCrAlY涂层上的氧化皮与底层涂层保持良好的结合。NiCrAlY层的加入抑制了Ti原子的向外扩散和Al原子的向内扩散。NiCrAlY 层也抑制了裂纹的扩展和孔隙的形成。因此，双相 Al/NiCrAlY 涂层具有优异的抗循环氧化性。