(Gd0.7Sr0.3)ZrO3.35涂层的CaO-MgO-Al2O3-SiO2(CMAS) 腐蚀行为

doi:10.11902/1005.4537.2016.171

中国腐蚀与防护学报

2017, Vol. 37

Issue (1): 47-52 DOI: 10.11902/1005.4537.2016.171

研究报告

本期目录 | 过刊浏览

(Gd_0.7Sr_0.3)ZrO_3.35涂层的CaO-MgO-Al₂O₃-SiO₂(CMAS) 腐蚀行为

蔡丽丽^1,²,马文^1,²(

),李新慧^1,²,尹轶川^1,²,马伯乐^1,²,白玉^1,²,王俊^1,²,董红英^2,³

1 内蒙古工业大学材料科学与工程学院呼和浩特 010051
2 内蒙古工业大学内蒙古自治区薄膜与涂层重点实验室呼和浩特 010051
3 内蒙古工业大学化工学院呼和浩特 010051

Corrosion Resistance of (Gd_0.7Sr_0.3)ZrO_3.35 Coating against CaO-MgO-Al₂O₃-SiO₂ (CMAS)

Lili CAI^1,²,Wen MA^1,²(

),Xinhui LI^1,²,Yichuan YIN^1,²,Bole MA^1,²,Yu BAI^1,²,Jun WANG^1,²,Hongying DONG^2,³

1 School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
2 Inner Mongolia Key Laboratory of Thin Film and Coatings Technology, Inner Mongolia University of Technology, Hohhot 010051, China
3 School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

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摘要:

采用APS制备了 (Gd_0.7Sr_0.3)ZrO_3.35涂层,将涂覆CaO-MgO-Al₂O₃-SiO₂ (CMAS)的 (Gd_0.7Sr_0.3)ZrO_3.35涂层以及 (Gd_0.7Sr_0.3)ZrO_3.35与CMAS混合粉末在1250 ℃分别热处理1,4,8和12 h。使用XRD和SEM分别对腐蚀产物的相组成、显微形貌进行分析。结果表明：(Gd_0.7Sr_0.3)ZrO_3.35涂层抗CMAS腐蚀性能良好,原因是在腐蚀产物层内形成了由磷灰石相Ca₂Gd₈(SiO₄)₆O₂和c-ZrO₂组成的致密的阻碍层,有效地抑制了CMAS的进一步腐蚀。

关键词 ：热障涂层, (Gd_0.7Sr_0.3)ZrO_3.35涂层, CMAS, 磷灰石相

Abstract：

(Gd_0.7Sr_0.3)ZrO_3.35 coating was prepared on superalloy In718 by air plasma spray (APS). The corrosion behavior of (Gd_0.7Sr_0.3)ZrO_3.35 coated alloy beneath a deposit of 30 mg/cm² CMAS was examined in air at 1250 ℃for 1, 4, 8 and 12 h, respectively. While the reaction of the powder mixture of (Gd_0.7Sr_0.3)ZrO_3.35 and CMAS was also studied parallel. The phase constitutes and microstructures of the corrosion products were characterized by XRD and SEM, respectively. The results showed that the (Gd_0.7Sr_0.3)ZrO_3.35 coating had better resistance against CMAS corrosion. The corrosion products formed between CMAS and (Gd_0.7Sr_0.3)ZrO_3.35 coating during the corrosion process consists of apatite Ca₂Gd₈(SiO₄)₆O₂ and c-ZrO₂, which can effectively protect the (Gd_0.7Sr_0.3)ZrO_3.35 coating from further attack by CMAS.

Key words： thermal barrier coating (Gd_0.7Sr_0.3)ZrO_3.35 coating CMAS apatite

收稿日期: 2016-09-18

基金资助:国家自然科学基金 (51462026和51672136) 及内蒙古自然科学基金 (2014MS0509)

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引用本文:

蔡丽丽,马文,李新慧,尹轶川,马伯乐,白玉,王俊,董红英. (Gd_0.7Sr_0.3)ZrO_3.35涂层的CaO-MgO-Al₂O₃-SiO₂(CMAS) 腐蚀行为[J]. 中国腐蚀与防护学报, 2017, 37(1): 47-52.
Lili CAI, Wen MA, Xinhui LI, Yichuan YIN, Bole MA, Yu BAI, Jun WANG, Hongying DONG. Corrosion Resistance of (Gd_0.7Sr_0.3)ZrO_3.35 Coating against CaO-MgO-Al₂O₃-SiO₂ (CMAS). Journal of Chinese Society for Corrosion and protection, 2017, 37(1): 47-52.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.171 或 https://www.jcscp.org/CN/Y2017/V37/I1/47

图1 (Gd0.7Sr0.3)ZrO3.35 涂层在1250 ℃下经CMAS腐蚀不同时间后的截面SEM像

图2 (Gd0.7Sr0.3)ZrO3.35涂层在1250 ℃下CMAS腐蚀12 h后的元素面扫描结果

图3 (Gd0.7Sr0.3)ZrO3.35喷涂粉末和涂层的XRD谱

图4 (Gd0.7Sr0.3)ZrO3.35与CMAS混合粉末在1250 ℃热处理不同时间后的XRD谱

图5 (Gd0.7Sr0.3)ZrO3.35涂层在1250 ℃下经CMAS腐蚀不同时间后的截面SEM像

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