| 游离碳对化学气相沉积SiC纤维微结构的影响 |
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| 引用本文： | 郭长友,张彩碚,贺连龙,金宝宏,石南林. 游离碳对化学气相沉积SiC纤维微结构的影响[J]. 金属学报, 2007, 43(2): 165-170 |
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| 作者姓名： | 郭长友 张彩碚 贺连龙 金宝宏 石南林 |
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| 作者单位： | 东北大学理学院,沈阳,110004;中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016;东北大学理学院,沈阳,110004;中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016;中国科学院金属研究所,沈阳,110016 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 利用分析电子显微镜(AEM)研究了在用化学气相沉积方法沉积SiC过程中加入游离碳对SiC纤维(W芯)微结构的影响.游离碳能够有效的避免在SiC/W芯界面上出现WO3,排除氧元素在纤维中存留;同时还能够有效地抑制W芯附近SiC晶粒的长大,并在SiC中形成许多同心的富C层.这些微结构上的变化可使SiC纤维强度从2800 MPa提高到3600 MPa.
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| 关 键 词： | SiC纤维 分析电子显微术(AEM) 微结构 强度 |
| 文章编号： | 0412-1961（2007）02-0165-06 |
| 收稿时间： | 2006-07-21 |
| 修稿时间： | 2006-07-212006-09-28 |
Effect of Excess Free Carbon on Microstructure and Strength of SiC Fiber |
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| GUO Changyou,ZHANG Caibei,HE Lianlong,JIN Baohong,SHI Nanlin. Effect of Excess Free Carbon on Microstructure and Strength of SiC Fiber[J]. Acta Metallurgica Sinica, 2007, 43(2): 165-170 |
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| Authors: | GUO Changyou ZHANG Caibei HE Lianlong JIN Baohong SHI Nanlin |
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| Affiliation: | 1. College of Sciences, Northeastern University, Shenyang 110004 ;2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences Shenyang 110016; 3. Institute of Metal Research, Chinese Academic of Sciences, Shenyang 110016 |
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| Abstract: | Analytical electron microscopy (AEM) was applied to investigate the effects of addition of free carbon on the microstructure of SiC fiber during chemical vapor deposition and the relation between microstructure of SiC fiber.The results indicate that carbon addition can effectively avoid WO3 formation at the W/SiC interface,and no oxygen element existed in fiber,while the grain size of SiC can be reduced,especially adjacent to W core.In addition,many concentric C rich layers formed within SiC.Above changes in microstructure can improve fiber's strength from 2800 MPa to 3600 MPa. |
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| Keywords: | SiC fiber analytical electron microscopy (AEM) microstructure strength |
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