2.h,達(dá)到了航空工業(yè)標(biāo)準(zhǔn)的“抗氧化級(jí)”；等離子粘結(jié)層優(yōu)先發(fā)生氧化反應(yīng),起到犧牲作用,并提高了粘結(jié)層/面層界面的應(yīng)力容忍度,延長(zhǎng)了涂層的使用壽命。"/>

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真空熱處理雙粘結(jié)層熱障涂層抗氧化性能
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中國(guó)科學(xué)院金屬研究所

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中圖分類號(hào):

TG178

基金項(xiàng)目:

裝備預(yù)研(項(xiàng)目號(hào)6142703190303)


Oxidation resistance of thermal barrier coating with vacuum heat treated double-layer bond coating
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Institute of Metal Research,Chinese Academy of Sciences

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    摘要:

    傳統(tǒng)單層結(jié)構(gòu)粘結(jié)層熱障涂層抗氧化性能不足壽命短,采用超音速火焰噴涂和大氣等離子噴涂制備雙層結(jié)構(gòu)粘結(jié)層,對(duì)粘結(jié)層進(jìn)行真空熱處理,研究熱障涂層的抗氧化性能。結(jié)果顯示,經(jīng)過(guò)1050℃×3h真空熱處理,粘結(jié)層組織中β-(Co, Ni)Al相含量從13.91%升高至27.78%,分布更加均勻；HVOF粘結(jié)層真空熱處理后粗糙度降低,等離子層的引入,使真空熱處理態(tài)粘結(jié)層粗糙度由Ra 7.2μm提升至Ra 10.4μm,熱障涂層結(jié)合強(qiáng)度達(dá)到39.4MPa；熱障涂層1050℃×200h氧化速率低至0.1719g/m2.h,達(dá)到了航空工業(yè)標(biāo)準(zhǔn)的“抗氧化級(jí)”；等離子粘結(jié)層優(yōu)先發(fā)生氧化反應(yīng),起到犧牲作用,并提高了粘結(jié)層/面層界面的應(yīng)力容忍度,延長(zhǎng)了涂層的使用壽命。

    Abstract:

    The lifetime of traditional thermal barrier coating with one layer bond coating is limited by the insufficient oxidation resistance. A thermal barrier coating with a double-layer bond coating was prepared by HVOF and APS. Vacuum heat treatment was carried out prior to the top coating. Oxidation resistance of the thermal barrier coating was researched. The results show that the content of β-(Co, Ni)Al phase is raised from 13.91% to 27.78% by the 1050℃×3h vacuum heat treatment, and the distribution is more homogeneous. The roughness of HVOF sprayed bond coating is decreased by vacuum heat treatment. The roughness of vacuum heat treated bond coating is raised from Ra 7.2μm to Ra 10.4μm by the introduction of APS layer, and the bonding strength of thermal barrier coating is up to 39.4MPa. The wight gain rate of thermal barrier coating is 0.1719g/m2.h after oxidized at 1050℃ for 200h, which is consistent with antioxidant level of aviation industry standard. The bond coating sprayed by APS is sacrificed to oxidize prior to HVOF layer. The stress tolerance of bond coating/top coating interface is improved, and the lifetime will be extended.

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高明浩,欒勝家,徐娜,周恬伊,常輝,朱宏博,張甲,侯萬(wàn)良,常新春.真空熱處理雙粘結(jié)層熱障涂層抗氧化性能[J].稀有金屬材料與工程,2022,51(2):719~726.[Gao Minghao, Luan Shengjia, Xu Na, Zhou Tianyi, Chang Hui, Zhu Hongbo, Zhang Jia, Hou Wanliang, Chang Xinchun. Oxidation resistance of thermal barrier coating with vacuum heat treated double-layer bond coating[J]. Rare Metal Materials and Engineering,2022,51(2):719~726.]
DOI：10.12442/j. issn.1002-185X.20210188

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  • 收稿日期:2021-03-08
  • 最后修改日期:2021-04-15
  • 錄用日期:2021-05-13
  • 在線發(fā)布日期: 2022-03-09
  • 出版日期: 2022-02-28