双连续Si_3N_4/1Cr18Ni9Ti复合材料的制备和冲蚀性能
Preparation and Erosion Performance for Co-continuous Phase Composites of Si_3N_4/1Cr18Ni9Ti
查看参考文献24篇
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文摘
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用凝胶注模和压力铸造两步法制备具有双连续结构的Si_3N_4/1Cr18Ni9Ti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,Si_3N_4/1Cr18Ni9Ti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∝V~(0.67)),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Si_3N_4/1Cr18Ni9Ti复合材料,具有更加优异的耐冲蚀性能。 |
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其他语种文摘
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Composites with co-continuous structure of Si_3N_4/1Cr18Ni9Ti were prepared via a twostep 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 Si_3N_4/1Cr18Ni9Ti composites exhibited a perfect co-continuous phase structure with a good combination between Si_3N_4 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 (E∝V~(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 Si_3N_4/1Cr18Ni9Ti exhibits superior erosion resistance,in contrast with the plain 1Cr18Ni9Ti steel. |
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来源
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材料研究学报
,2019,33(1):34-42 【核心库】
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DOI
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10.11901/1005.3093.2018.296
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关键词
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复合材料
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双连续相
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泥浆冲蚀
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1Cr18Ni9Ti
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泡沫陶瓷
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地址
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1.
中国科学院金属研究所, 沈阳, 110016
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中国科学技术大学材料科学与工程学院, 沈阳, 110016
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辽宁卓异新材料有限公司, 营口, 115004
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-3093 |
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学科
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一般工业技术 |
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基金
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国家重点研发计划重点专项
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文献收藏号
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CSCD:6414942
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