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粉末冶金材料科学与工程 >

2026 , Vol. 31 >Issue 1: 71 - 85

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2025048

工艺技术

聚合物转化(5RE0.2)2SixO2x+3/SiOC纳米复相陶瓷在1 300~1 500 ℃的耐CMAS腐蚀性能

  • 黄旭 ,
  • 文青波 ,
  • 蒋洋洋 ,
  • 江涛 ,
  • 邹红飞 ,
  • 熊翔
展开
  • 1.中南大学 粉末冶金全国重点实验室,长沙 410083;
    2.江苏沃峰新材料有限公司,扬州 225800;
    3.扬州腾飞电缆电器材料有限公司,扬州 225800
文青波,教授,博士。电话：15580877198;E-mail: wentsingbo@csu.edu.cn

收稿日期: 2025-05-20

  修回日期: 2025-11-02

  网络出版日期: 2026-03-10

基金资助

国家自然科学基金资助项目(52472082); 粉末冶金全国重点实验室自主课题资助项目(621022335)

收起

CMAS corrosion resistance of polymer-derived (5RE0.2)2SixO2x+3/SiOC ceramic nanocomposites at 1 300-1 500 ℃

  • HUANG Xu ,
  • WEN Qingbo ,
  • JIANG Yangyang ,
  • JIANG Tao ,
  • ZOU Hongfei ,
  • XIONG Xiang
Expand
  • 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
    2. Jiangsu Wofeng New Materials Co., Ltd, Yangzhou 225800, China;
    3. Yangzhou Tengfei Cable Electrical Materials Co., Ltd, Yangzhou 225800, China

Received date: 2025-05-20

  Revised date: 2025-11-02

  Online published: 2026-03-10

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摘要

本文以稀土醋酸盐和聚硅氧烷为原料,采用聚合物转化陶瓷法及放电等离子烧结技术制备致密的(5RE0.2)2SixO2x+3/SiOC (RE=Yb、Ho、Er、Lu、Tb、Tm、Gd,x=1或2)纳米复相陶瓷块体,通过X射线衍射仪、扫描电子显微镜、透射电子显微镜等研究纳米复相陶瓷在1 300~1 500 ℃的耐CaO-MgO-Al2O3-SiO2 (CMAS)腐蚀性能,并探究其腐蚀机理。结果表明：纳米复相陶瓷由SiOC基体和均匀分布于其中的高熵稀土硅酸盐相(5RE0.2)2SixO2x+3组成,其在1 300~1 500 ℃的质量损失率较低,腐蚀层较薄,具有优异的耐CMAS腐蚀性能。这主要是由于(5RE0.2)2SixO2x+3相与CMAS熔融盐反应生成了Ca3(5RE0.2)2(Si3O9)2环状硅酸盐层,能有效阻止熔盐的进一步侵蚀。此外,(5RE0.2)2SixO2x+3中稀土元素的种类对纳米复相陶瓷耐CMAS腐蚀性能有关键性影响。含Gd元素的纳米复相陶瓷在1 300 ℃具备最佳长时耐CMAS腐蚀性能,腐蚀20 h质量损失仅3.6%;而含Tb的纳米复相陶瓷具有更高的耐腐蚀温度,在1 500 ℃腐蚀5 h后的腐蚀厚度仅20 μm。

关键词： 聚合物转化陶瓷; 纳米复相陶瓷; 高熵陶瓷; 稀土硅酸盐; CMAS腐蚀

本文引用格式

黄旭 , 文青波 , 蒋洋洋 , 江涛 , 邹红飞 , 熊翔 . 聚合物转化(5RE0.2)2SixO2x+3/SiOC纳米复相陶瓷在1 300~1 500 ℃的耐CMAS腐蚀性能[J]. 粉末冶金材料科学与工程, 2026 , 31(1) : 71 -85 . DOI: 10.19976/j.cnki.43-1448/TF.2025048

Abstract

Dense monolithic (5RE0.2)2SixO2x+3/SiOC (RE=Yb, Ho, Er, Lu, Tb, Tm, Gd, x=1 or 2) ceramic nanocomposites were fabricated from rare-earth acetates and polysiloxane via the polymer-derived ceramics route coupled with spark plasma sintering. The resistance of the ceramic nanocomposites to CaO-MgO-Al2O3-SiO2 (CMAS) corrosion at 1 300-1 500 ℃, along with the underlying corrosion mechanisms, was investigated using X-ray diffractometer, scanning electron microscope, and transmission electron microscope. The results indicate that the ceramic nanocomposites comprise a SiOC matrix with a uniformly distributed high-entropy rare-earth silicate phase (5RE0.2)2SixO2x+3. The ceramic nanocomposites exhibit low mass loss and a thin corrosion layer at 1 300- 1 500 ℃, demonstrating excellent CMAS corrosion resistance. This superior performance is primarily attributed to the formation of a Ca3(5RE)2(Si3O9)2 cyclosilicate layer, resulting from the reaction between the (5RE0.2)2SixO2x+3phase and the molten CMAS, which effectively inhibit further infiltration. Furthermore, the specific rare-earth element in the (5RE0.2)2SixO2x+3 phase plays a crucial role in the CMAS corrosion resistance of the ceramic nanocomposites. Gd-containing ceramic nanocomposites exhibit optimal long-term resistance at 1 300 ℃, with a mass loss of only 3.6% after 20 h of corrosion. In contrast, Tb-containing ceramic nanocomposites demonstrate superior performance at a higher temperature, resulting in a remarkably thin corrosion layer of merely 20 μm after corrosion at 1 500 ℃ for 5 h.

Key words： polymer-derived ceramic; ceramic nanocomposite; high entropy ceramic; rare earth silicate; CMAS corrosion

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