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| Y2O3对反应烧结Si3N4/SiC复相陶瓷组织和性能的影响 | |
| 引用本文： | 耿桂宏,罗绍华,毕晓露,武聪,陈宇红,韩非.Y2O3对反应烧结Si3N4/SiC复相陶瓷组织和性能的影响[J].材料热处理学报,2012,33(7):13-18. |
| 作者姓名： | 耿桂宏 罗绍华 毕晓露 武聪 陈宇红 韩非 |
| 作者单位： | 1. 北方民族大学材料科学与工程学院,宁夏银川,750021 2. 东北大学秦皇岛分校资源与材料学院,河北秦皇岛,066004 3. 东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004 北京理工大学材料学院,北京100801 |
| 基金项目： | 宁夏自然科学基金资助项目，中央高校基本科研业务费，河北省应用基础研究计划重点基础研究项目，北方民族大学自主科研资金项目 |
| 摘 要： | 以低压铸造用升液管为研究目的,以Y2O3-Al2O3-Fe2O3为复合烧结助剂,磨切单晶硅废料Si粉和SiC为主料,反应烧结法制备Si3N4/SiC复相陶瓷。研究了Y2O3含量对复合材料结构和力学性能的影响,采用XRD、SEM对复合材料的相组成、微观形貌进行分析。结果表明,反应烧结后试样生成Si3N4结合SiC晶粒为主相的烧结体,并含有少量Sialon晶须及未反应的Si。Y2O3含量对复相陶瓷力学性能影响很大,在分析稀土Y2O3作用机理的基础上,得到2.5%Y2O3优化试样的力学性能优良,相对密度达到88%,维氏硬度达到1.1 GPa,常温抗弯强度50 MPa。 |
| 关 键 词： | Si3N4/SiC复相陶瓷 Y2O3 烧结助剂 反应烧结 力学性能 |
Effect of yttrium oxide additives on microstructure and properties of reaction-sintered Si3N4SiC multiphase ceramics |
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| GENG Gui-hong,LUO Shao-hua,BI Xiao-lu,WU Cong,CHEN Yu-hong,HAN Fei.Effect of yttrium oxide additives on microstructure and properties of reaction-sintered Si3N4SiC multiphase ceramics[J].Transactions of Materials and Heat Treatment,2012,33(7):13-18. | |
| Authors: | GENG Gui-hong LUO Shao-hua BI Xiao-lu WU Cong CHEN Yu-hong HAN Fei |
| Affiliation: | 1(1.School of Materials Science and Engineering,Beifang University of Nationalities,Yinchuan 750021,China; 2.School of Resources and Materials,Northeastern University at Qinhuangdao Branch,Qinhuangdao 066004, China;3.School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100801,China) |
| Abstract: | In order to meet the requirements of lift tube in aluminium alloy low-pressure die-casting,Si3N4 bonded SiC multi-phase ceramics were fabricated by reaction-sintering from Si and SiC powders,using Y2O3-Al2O3-Fe2O3 as sintering additives.The effect of Y2O3 content on microstructure and mechanical properties of the ceramics was studied.The phase components and surface morphology of the ceramics were observed and analyzed by XRD and SEM.The results show that the sintered materials mainly consist of Si3N4 and SiC with a small amount of Sialon and residual Si particles.Significant effect of Y2O3 content on mechanical properties of the multi-phase ceramics is observed.Based on the experiments,optimum mechanical properties of sample with 2.5%Y2O3are obtained,which are the relative density of 88%,Vicker’s hardness of 1.1 GPa and room temperature flexural strength of 50 MPa. |
| Keywords: | Si3N4SiC Y2O3 sintering additives reaction sintering mechanical property |
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