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材料研究学报  2019, Vol. 33 Issue (1): 34-42    DOI: 10.11901/1005.3093.2018.296
  研究论文 本期目录 | 过刊浏览 |
双连续Si3N4/1Cr18Ni9Ti复合材料的制备和冲蚀性能
杜奇1,2,高勇1,任志恒1,3,曹小明1,王超1,张劲松1()
1. 中国科学院金属研究所 沈阳 110016
2. 中国科学技术大学材料科学与工程学院 沈阳 110016
3. 辽宁卓异新材料有限公司 营口 115004
Preparation and Erosion Performance for Co-continuous Phase Composites of Si3N4/1Cr18Ni9Ti
Qi DU1,2,Yong GAO1,Zhiheng REN1,3,Xiaoming CAO1,Chao WANG1,Jinsong ZHANG1()
1. Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
3. Liaoning ZhuoYi New Materials Corporation, Yingkou 115004, China
引用本文:

杜奇,高勇,任志恒,曹小明,王超,张劲松. 双连续Si3N4/1Cr18Ni9Ti复合材料的制备和冲蚀性能[J]. 材料研究学报, 2019, 33(1): 34-42.
Qi DU, Yong GAO, Zhiheng REN, Xiaoming CAO, Chao WANG, Jinsong ZHANG. Preparation and Erosion Performance for Co-continuous Phase Composites of Si3N4/1Cr18Ni9Ti[J]. Chinese Journal of Materials Research, 2019, 33(1): 34-42.

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摘要: 

用凝胶注模和压力铸造两步法制备具有双连续结构的Si3N4/1Cr18Ni9Ti复合材料并分析其物相组成、宏观和微观结构,研究了材料的冲蚀率与攻角、流速、含沙量以及时间的关系。结果表明,与1Cr18Ni9Ti材料相比,Si3N4/1Cr18Ni9Ti复合材料具有双连续结构,界面结合良好;其冲蚀率随着攻角变化的幅度小,冲蚀率与流速之间的关系由1Cr18Ni9Ti材料的线性关系转变为指数关系(E∝V0.67),且随着时间的延长冲蚀率降低;冲蚀率与含沙量之间的关系仍呈线性。具有双连续结构的Si3N4/1Cr18Ni9Ti复合材料,具有更加优异的耐冲蚀性能。

关键词 复合材料双连续相泥浆冲蚀1Cr18Ni9Ti泡沫陶瓷    
Abstract

Composites with co-continuous structure of Si3N4/1Cr18Ni9Ti were prepared via a two-step process, namely gel casting and pressure casting. The phase composition, macro- and micro-structure of the composites were characterized. The erosion rate in flow slurry composed of water and quartz sand, as a function of impingement angle, flow velocity, sand content and erosion time was assessed in comparison with the plain 1Cr18Ni9Ti. Results show that Si3N4/1Cr18Ni9Ti composites exhibited a perfect co-continuous phase structure with a good combination between Si3N4 and 1Cr18Ni9Ti; the fluctuation of erosion rate as a function of impingement angle of this composites is smaller than that of 1Cr18Ni9Ti; the erosion rate of composites has an exponent relationship with flow velocity (EV 0.67), while there is a linear relationship between the erosion rate and flow velocity for 1Cr18Ni9Ti; the erosion rate of this composites decreases gradually with the increasing erosion time and then stabilizes, while that of 1Cr18Ni9Ti is hardly changed; There is a linear relationship between the erosion rate and sand content in the slurry for the two materials. The composite with co-continuous structure of Si3N4/1Cr18Ni9Ti exhibits superior erosion resistance, in contrast with the plain 1Cr18Ni9Ti steel.

Key wordscomposite    co-continuous phase    slurry erosion    1Cr18Ni9Ti    foam ceramic
收稿日期: 2018-04-26     
ZTFLH:  TB333  
基金资助:国家重点研发计划重点专项(2017YFB0310405)
作者简介: 杜奇,男,1991年生,硕士生
图1  冲蚀磨损试验装置的示意图
图2  Si3N4泡沫陶瓷的XRD谱
图3  Si3N4泡沫陶瓷的形貌
图4  双连续Si3N4/1Cr18Ni9Ti复合材料的形貌
PointsCNAlSiCrMnFeNi
1(Fe based solid solution)------6.789.992.3872.47--
2(Si3N4)--33.072.2064.27----0.46--
3(CrN)--19.790.421.2774.87--3.64--
4(Fe based solid solution)------7.1612.953.9665.1610.77
5(Fe based solid solution)7.26----1.6515.912.3665.377.46
表1  不同微区EDS元素分析
图5  冲蚀率与攻角的关系
图6  冲蚀率与流速的关系
图7  1Cr18Ni9Ti和复合材料磨损后的SEM和三维表面轮廓图
图8  冲蚀率与含沙量的关系
图9  1Cr18Ni9Ti、双连续Si3N4/1Cr18Ni9Ti复合材料和Si3N4陶瓷3种材料耐冲蚀性的比较
图10  复合材料冲蚀前后高度差
图11  双连续Si3N4/1Cr18Ni9Ti复合材料的冲蚀机理示意图
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