剛玉-莫來石推板高溫行為和顯微結構

衛曉輝; 王金相; 孫加林; 李福燊; 孫庚辰; 張振燕

doi:10.13374/j.issn1001-053x.2010.03.015

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剛玉-莫來石推板高溫行為和顯微結構

doi: 10.13374/j.issn1001-053x.2010.03.015

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 中鋼集團洛陽耐火材料研究院有限公司, 河南省特種耐火材料重點實驗室, 洛陽 471039

詳細信息

作者簡介:
衛曉輝(1968-),女,博士研究生,E-mail:weixhyue@126.com;王金相(1934-),男,教授,博士生導師

中圖分類號: TQ175.7
計量
- 文章訪問數: 153
- HTML全文瀏覽量: 21
- PDF下載量: 9
- 被引次數: 0
出版歷程
- 收稿日期: 2009-05-27

High-temperature behavior and microstructure of corundum-mullite pushers

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Sinosteel Corporation Luoyang Institute of Refractories Research, Henan Key Laboratory of Advanced Refractories, Luoyang 471039, China

摘要

摘要: 采用三點彎曲法對兩種剛玉-莫來石推板產品的高溫斷裂強度和1400℃下的高溫抗彎蠕變進行了對比研究.結果表明,進口推板材料具有較高的高溫斷裂強度和較好的高溫抗彎蠕變性能,其結構特點是以紅柱石顆粒為骨料,基質中形成良好的薄膜狀莫來石結合剛玉的結構,玻璃相含量極低.國產推板盡管基質中莫來石已形成網絡結構,但內部存在少量玻璃相,使得高溫斷裂強度較低,高溫抗彎蠕變性較差.莫來石形態和玻璃相的存在是影響材料高溫性能的決定因素.
- 剛玉 /
- 莫來石 /
- 高溫斷裂 /
- 彎曲蠕變 /
- 顯微結構
Abstract: The high-temperature rupture strength and the bending creep behavior at 1 400 ℃ of two types of corundum-mullite pushers were investigated by three-point bending test.The results show that the pusher produced oversea which introduces andalusite as an aggregate has excellent microstructure.Corundum bonded by uniform mullite forms in the matrix and no glass phase is detected.This structure leads to high rupture strength and good bending creep resistance.For the pusher produced domestically,few glass phase leads to lower rupture strength and poor bending creep resistance at 1 400 ℃ though mullite forms a network in the matrix.The morphology of mullite and the glass phase are important factors which affect the high-temperature mechanical properties of a pusher.
- corundum /
- mullite /
- high-temperature fracture /
- bending creep /
- microstructure