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hanbing579木虫 (正式写手)
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摘 要：采用化学气相沉积（CVD）方法，以MTS为前驱体溶液，在原位生长有碳纳米管（Carbon nanotubes，CNTs）的C/C复合材料基体上1000℃~1150℃制备了碳化硅涂层。分析了不同温度碳化硅涂层表面、截面以及碳化硅颗粒的微观形貌，结果表明：1000℃时，得到晶须状SiC，1050℃时，生成的涂层平整、致密；温度超过1100℃时，涂层粗糙，1150℃有类似岛状的组织；碳化硅颗粒的存在形式决定了涂层的质量，涂层表面和截面的形貌取决与碳化硅颗粒的形貌和结构。对涂层成分和断口形貌研究表明，基体和涂层之间有一个过渡区，SiC涂层和基体之间的结合强度很高。 关键词：碳/碳复合材料；CNT-SiC复合涂层；碳纳米管；CVD |
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3楼2009-06-24 21:02:04
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
hanbing579(金币+10,VIP+0):谢谢，非常好 6-25 17:54
hanbing579(金币+10,VIP+0):谢谢，非常好 6-25 17:54
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Abstract: In this paper, chemical Vapor Deposition (CVD) methods was used. MTS was prepared as pre-solution. SiC coating was synthesized on C/C composites which carbon nanotubes (Carbon nanotubes, CNTs) was grown at 1000 ℃ ~ 1150 ℃. Surface coating of silicon carbide at different temperatures were measured, as well as the cross-section morphology of silicon carbide particles. The results showed that at 1000 ℃, the whisker-like SiC was obtained; at 1050 ℃, the coating formation was smooth and thick. When temperature is over 1100 ℃, The coating formation was unsmooth. Discontinued patterns were formed at 1150 ℃. The SiC particles determine the quality of coating surface. The coating surfaces and the cross-section depend on the morphology of silicon carbide particles and structure. The coating composition and fracture surface studies have shown that there is a transition zone between base and coating and the bonding strength is high between SiC coating and base. Key words: carbon / carbon composites; CNT-SiC composite coating; carbon nanotubes; CVD [ Last edited by cloisonne on 2009-6-24 at 21:12 ] |
4楼2009-06-24 21:11:17
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The impact of electromagnetic relays for the output characteristics of a number of design parameters, the use of orthogonal experimental design methods to test a representative data analysis program design parameters on the specific output significantly, and has been a key design parameters and objectives identified in accordance with the corresponding the level of the best combination of parameters; based on the implicit non-linear sensitivity analysis of system of thought, through the random number generator and validation, virtual Abstract: Chemical Vapor Deposition (CVD) methods to MTS as precursor solution, in situ growth of carbon Nanotube (Carbon nanotubes, CNTs) in C / C matrix composites 1000 ℃ ~ 1150 ℃ SiC coating was prepared. Analysis of the surface coating of silicon carbide at different temperatures, as well as the cross-section morphology of silicon carbide particles, results showed that: 1000 ℃, the obtained whisker-like SiC, 1050 ℃, the generation of the coating formation, dense; when temperature is over 1100 ℃ , rough-coated, 1150 ℃ island similar organizations; SiC particles form determines the quality of coating, coating surfaces and cross-section depends on the morphology of silicon carbide particle morphology and structure. Of the coating composition and fracture surface studies have shown that the coating matrix and a transition zone between, SiC coating and matrix bonding strength between the high. Key words: carbon / carbon composites; CNT-SiC composite coating; carbon nanotubes; CVD |
5楼2009-06-25 07:56:32
