Gd2(Zr1-xCex)2O7热障涂层陶瓷层材料的CMAS热腐蚀行为研究

doi:10.11902/1005.4537.2020.023

中国腐蚀与防护学报

2021, Vol. 41

Issue (2): 263-270 DOI: 10.11902/1005.4537.2020.023

研究报告

本期目录 | 过刊浏览

Gd₂(Zr_1-_xCe_x)₂O₇热障涂层陶瓷层材料的CMAS热腐蚀行为研究

姜伯晨¹, 曹将栋¹^,²(

), 曹雪玉¹, 王建涛¹, 张少朋³

^1.江苏航运职业技术学院智能制造与信息学院南通 226000
^2.江苏天舒电器有限公司南通 226000
^3.江苏大学材料学院镇江 212013

Hot Corrosion Behavior of Gd₂(Zr_1-_xCe_x)₂O₇ Thermal Barrier Coating Ceramics Exposed to Artificial Particulates of CMAS

JIANG Bochen¹, CAO Jiangdong¹^,²(

), CAO Xueyu¹, WANG Jiantao¹, ZHANG Shaopeng³

^1.School of Intelligent Manufacturing and Information, Jiangsu Shipping College, Nantong 226000, China
^2.Jiangsu Tianshu Electric Co. , Ltd. , Nantong 226000, China
^3.School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

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摘要:

在1250 ℃的温度下对Gd₂(Zr_1-_xCe_x)₂O₇ (x=0，0.1，0.2，0.3) 陶瓷分别进行了5、10和20 h不同腐蚀时间的CMAS热腐蚀实验，利用XRD、SEM及EDS等表征手段对腐蚀过程中元素的扩散、物相和形貌的变化进行了研究。结果表明，CMAS与Gd₂ (Zr_1-_xCe_x)₂O₇(x=0，0.1，0.2，0.3) 陶瓷在不同的腐蚀时间段内都会生成以萤石Ca_0.2(Zr_xCe_1-_x)_0.8O_1.8和磷灰石Ca₂ (Gd_xCe_1-x)₈(SiO₄)₆O_6-4_x为主的反应层腐蚀产物。Ce⁴⁺的掺杂含量越多，反应层的厚度越薄，而Gd₂(Zr_0.7Ce_0.3)₂O₇在任一腐蚀时间段其反应层厚度都是最薄的，相比较而言其抗CMAS热腐蚀性能是最好的。Ce⁴⁺的掺杂加快了CMAS与陶瓷的反应速率，从而快速形成致密的反应层阻止CMAS向陶瓷层内部的侵蚀并且提高了陶瓷的应变容限。

关键词 ： CMAS热腐蚀, CeO₂, Gd₂Zr₂O₇陶瓷, 掺杂

Abstract：

Artificial particulates of calcium magnesium aluminum silicate (CMAS) induced hot-corrosion of Gd₂(Zr_1-_xCe_x)₂O₇ (x=0, 0.1, 0.2, 0.3) ceramics at 1250 ℃ for 5, 10 and 20 h in lab atmosphere. Was assessed by means of XRD, SEM and EDS. The results show that the reaction of CMAS and Gd₂(Zr_1-_xCe_x)₂O₇ (x=0, 0.1, 0.2, 0.3) ceramics will generate the corrosion products composed mainly of fluorite Ca_0.2(Zr_xCe_1-_x) _0.8O_1.8 and apatite Ca₂(Gd_xCe_1-_x)₈(SiO₄)₆O_6-4_x. The more Ce⁴⁺ doping content, the thinner the reaction layer, and GZ7C3 has the thinnest reaction layer thickness for any corrosion time period, thereby, its resistance to CMAS induced hot-corrosion is the best. The doping of Ce⁴⁺ accelerates the reaction rate between CMAS and ceramics, thereby quickly forming a dense reaction layer to prevent the CMAS from inward corrosion and increase the strain tolerance of the ceramic.

Key words： CMAS hot corrosion CeO₂ Gd₂Zr₂O₇ ceramics doping

收稿日期: 2020-02-26

ZTFLH:

TG174

基金资助:江苏省自然科学基金(BK20191204);江苏省高校自然科学基金(19KJB430031);南通市科技计划项目(GY12018032);江苏航运职业技术学院院级课题(HYKY/2020A02)

通讯作者: 曹将栋 E-mail: caojd@jssc.edu.cn

Corresponding author: CAO Jiangdong E-mail: caojd@jssc.edu.cn

作者简介: 姜伯晨，男，1993年生，硕士

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引用本文:

姜伯晨, 曹将栋, 曹雪玉, 王建涛, 张少朋. Gd₂(Zr_1-_xCe_x)₂O₇热障涂层陶瓷层材料的CMAS热腐蚀行为研究[J]. 中国腐蚀与防护学报, 2021, 41(2): 263-270.
Bochen JIANG, Jiangdong CAO, Xueyu CAO, Jiantao WANG, Shaopeng ZHANG. Hot Corrosion Behavior of Gd₂(Zr_1-_xCe_x)₂O₇ Thermal Barrier Coating Ceramics Exposed to Artificial Particulates of CMAS. Journal of Chinese Society for Corrosion and protection, 2021, 41(2): 263-270.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.023 或 https://www.jcscp.org/CN/Y2021/V41/I2/263

图1 Gd2(Zr1-xCex)2O7(x=0，0.1，0.2，0.3) 陶瓷块材XRD谱

图2 1250 ℃，20 h CMAS热腐蚀后的Gd2(Zr1-xCex)2O7(x=0，0.1，0.2，0.3) 陶瓷XRD谱

图3 Gd2(Zr1-xCex)2O7(x=0，0.1，0.2，0.3) 陶瓷于1250 ℃下CMAS腐蚀5 h的截面形貌

图4 Gd2(Zr1-xCex)2O7(x=0，0.1，0.2，0.3) 陶瓷于1250 ℃下CMAS腐蚀10 h的截面形貌

图5 Gd2(Zr1-xCex)2O7(x=0，0.1，0.2，0.3) 陶瓷于1250 ℃下CMAS腐蚀20 h的截面形貌

图6 GZ 和GZ7C3腐蚀10 h后的腐蚀产物

表1 GZ和GZ7C3腐蚀10 h后产物的EDS测试结果

图7 GZ和 GZ7C3腐蚀5 h后的Ca和Si截面分布图

图8 Gd2(Zr1-xCex)2O7(x=0，0.1，0.2，0.3) 陶瓷在1250 ℃下CMAS腐蚀5、10和20 h的反应层厚度图

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