| 催化剂对B4C-SiC-Si复合材料组织与性能的影响 |
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| 引用本文： | 任全兴,冯东,茹红强,赵世伟,刘宝友,王伟,张翠萍. 催化剂对B4C-SiC-Si复合材料组织与性能的影响[J]. 稀有金属材料与工程, 2020, 49(2): 650-654 |
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| 作者姓名： | 任全兴 冯东 茹红强 赵世伟 刘宝友 王伟 张翠萍 |
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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室,东北大学 材料各向异性与织构教育部重点实验室,东北大学 材料各向异性与织构教育部重点实验室,东北大学 材料各向异性与织构教育部重点实验室,东北大学 材料各向异性与织构教育部重点实验室,东北大学 材料各向异性与织构教育部重点实验室,东北大学 材料各向异性与织构教育部重点实验室 |
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| 基金项目： | 国家自然科学基金(51772048)；国家重点研发计划(2017YFB0310300)；装备预先研究项目(4142210905,41422010903) |
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| 摘 要： | 采用间苯二酚甲醛水基凝胶体系,通过凝胶注模成形法制备B4C/C坯体,结合反应渗Si烧结工艺制备B4C-SiC-Si复合材料。重点考察Na2CO3、NaOH、KOH、Na2SiO3和NaHCO3 5种不同碱性催化剂对B4C-SiC-Si复合材料组织与力学性能的影响。结果表明:催化剂主要影响复合材料的组织均匀性及游离Si的尺寸。分别添加5种不同催化剂时复合材料均由BxC、B12(B,C,Si)3、SiC和Si组成。以NaOH、KOH或NaHCO3为催化剂时,复合材料中游离Si的分布较均匀、尺寸较小;以NaOH作为催化剂时,B4C-SiC-Si复合材料的综合力学性能最佳,其硬度、抗折强度和断裂韧性分别达到16.9 GPa、296 MPa和4.15 MPa·m1/2。
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| 关 键 词： | 催化剂 凝胶注模 B4C-SiC-Si复合材料 显微组织 力学性能 |
| 收稿时间： | 2019-04-02 |
| 修稿时间： | 2019-04-28 |
Effect of Catalysts on Microstructure and Properties of B4C-SiC-Si Composites |
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| Ren Quanxing,Feng Dong,Ru Hongqiang,Zhao shiwei,Liu baoyou,Wang Wei and Zhang Cuiping. Effect of Catalysts on Microstructure and Properties of B4C-SiC-Si Composites[J]. Rare Metal Materials and Engineering, 2020, 49(2): 650-654 |
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| Authors: | Ren Quanxing Feng Dong Ru Hongqiang Zhao shiwei Liu baoyou Wang Wei Zhang Cuiping |
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| Affiliation: | Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang Liaoning,Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang Liaoning,Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang Liaoning,Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang Liaoning,Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang Liaoning,Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang Liaoning,Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang Liaoning |
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| Abstract: | The B4C/C preforms were prepared by the gel-casting and the B4C-SiC-Si composites were fabricated based on liquid silicon infiltration process.The effects of different catalysts(Na2CO3,NaOH,KOH,Na2SiO3 and NaHCO3) on the micro structure and mechanical properties of B4C-SiC-Si composites were investigated.The results show that the catalyst mainly affects the microstructural uniformity of composites and the size of residual Si.The composites are mainly composed of B4C,B12(B,C,Si)3,SiC and Si.When NaOH,KOH or NaHCO3 are used as catalysts,the distribution of residual Si is uniform.With the NaOH as a catalyst,the mechanical properties of B4C-SiC-Si composites are the best,with the hardness,flexural strength and fracture toughness of 16.9 GPa,296 MPa and 4.15 MPa·m1/2,respectively. |
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| Keywords: | Catalyst Gel-casting B4C-SiC-Si composites microstructure mechanical properties |
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