| B_4C陶瓷材料的无压烧结与性能 |
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| 引用本文： | 岳新艳,应伟峰,喻亮,茹红强. B_4C陶瓷材料的无压烧结与性能[J]. 东北大学学报(自然科学版), 2010, 31(1): 56-59. DOI: - |
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| 作者姓名： | 岳新艳 应伟峰 喻亮 茹红强 |
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| 作者单位： | 东北大学,材料各向异性与织构教育部重点实验窀,辽宁,沈阳,110004 |
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| 基金项目： | 国家自然科学基金资助项目(50372010,50902018);;教育部创新团队发展计划项目(IRT0713) |
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| 摘 要： | 以碳化硼微粉作为原料,选用SiC和C为烧结助剂,研究了SiC和C对无压烧结B4C材料的体积密度、硬度、抗折强度和断裂韧性等性能的影响.结果表明,最佳烧结温度为1975℃,保温时间是30min.SiC和C的质量分数对材料密度、硬度和抗折强度的影响都是先增大后减小.烧结助剂SiC和C的最佳添加量分别为6%和5%(质量分数)时,得到相应的无压烧结B4C陶瓷材料的最佳力学性能:体积密度为2.45g/cm3,维氏硬度为35GPa,抗折强度为240MPa,断裂韧性为3.0MPa.m1/2
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| 关 键 词： | B4C 无压烧结 SiC C 烧结助剂 力学性能 |
Properties of B_4C Ceramics Prepared by Pressureless Sintering |
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| YUE Xin-yan,YING Wei-feng,YU Liang,RU Hong-qiang. Properties of B_4C Ceramics Prepared by Pressureless Sintering[J]. Journal of Northeastern University(Natural Science), 2010, 31(1): 56-59. DOI: - |
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| Authors: | YUE Xin-yan YING Wei-feng YU Liang RU Hong-qiang |
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| Affiliation: | Key Laboratory for Anisotropy and Texture of Materials;Ministry of Education;Northeastern University;Shenyang 110004;China. |
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| Abstract: | The effect of SiC and C sintering aids on the mechanical properties of B_4C ceramics prepared by pressureless sintering was investigated. Micro-powder B_4C, SiC and C were used as starting materials. The results showed that the optimum sintering process is at 1 975℃ holding for 30 min. The density, hardness and flexural strength all increase first then decrease with increasing SiC and C contents of which the optimal amount is 6 % and 5 %, respectively. The optimum bulk density, hardness, flexural strength and fracture toughness are 2.45 g/cm~3, 35 GPa, 240 MPa and 3.0 MPa·m~(1/2), respectively. |
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| Keywords: | B4C pressureless sintering SiC C sintering aid mechanical properties |
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