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鉑鋁涂層高溫氧化的影響因素研究
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Influence Factors of High Temperature Oxidation for Pt-Modified-Aluminide Bond Coatings
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    摘要:

    研究比較沉積熱障涂層和無(wú)熱障涂層的鎳基高溫合金鉑改性鋁化物涂層在900，1000和1100 ℃空氣中高溫氧化生成的氧化鋁層表面形態(tài)和斷面結(jié)構(gòu)。發(fā)現(xiàn)低鉑含量涂層氧化初期熱生長(zhǎng)層(TGO)表面有放射狀裂紋形成和長(zhǎng)大，造成氧化鋁的局部脫落，并在TGO與鉑鋁涂層界面形成空洞。涂層900 ℃循環(huán)氧化300 h后TGO內(nèi)部均形成空洞。而在1100 ℃氧化時(shí)，TBC陶瓷層的存在改變了兩種鉑鋁涂層TGO的內(nèi)應(yīng)力變化趨勢(shì)，升高溫度使TGO厚度迅速增大，涂層壽命迅速下降

    Abstract:

    Oxidation of EB-PVD thermal barrier coatings (TBC) deposited and undeposited on nickel base superalloy CMSX-4 with Pt content modified aluminide bond coating have been studied in air at 900, 1000 and 1100 ℃ in order to determine the influence factor of temperature, Pt content and TBC for TGO. It is found that some cracks growth due to the alumina phase transformation and aluminum oxide spallation happened on the surface of low αAl coating TGO. Some voids were formed on the interface between TGO and low aAl bond coating during the initial oxidation period. However, at 900 ℃ inner voids still exist after 300 h oxidation. Thermally grown oxide (TGO) stress trend of samples with TBC was also different compared with that without TBC. The TBC lifetime would be rapidly decreased if the operated oxidation temperature increases

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宋 鵬,陸建生,呂建國(guó),張德豐.鉑鋁涂層高溫氧化的影響因素研究[J].稀有金屬材料與工程,2010,39(2):304~308.[Song Peng, Lu Jiansheng, Lü Jianguo, Zhang Defeng. Influence Factors of High Temperature Oxidation for Pt-Modified-Aluminide Bond Coatings[J]. Rare Metal Materials and Engineering,2010,39(2):304~308.]
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  • 收稿日期:2009-02-23
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