| SiC/C遗态陶瓷的制备工艺研究 |
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| 引用本文： | 贺辛亥,王俊勃,申明乾,付翀,徐洁,苏晓磊,杨敏鸽.SiC/C遗态陶瓷的制备工艺研究[J].兵器材料科学与工程,2011,34(2):1-4. |
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| 作者姓名： | 贺辛亥 王俊勃 申明乾 付翀 徐洁 苏晓磊 杨敏鸽 |
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| 作者单位： | 西安工程大学,机电工程学院,陕西,西安,710048;西北工业大学,机电学院,陕西,西安,710072;西安工程大学,机电工程学院,陕西,西安,710048 |
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| 基金项目： | 国家自然科学基金，陕西省教育厅自然科学专项基金，中国纺织工业协会科技指导性项目，西安工程大学基础研究基金 |
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| 摘 要： | 以苎麻纤维为生物模板,经溶胶-凝胶浸渍工艺获得苎麻/SiO2前驱体A和苎麻/酚醛树脂/SiO2前驱体B,在真空炉中经1 500℃碳热还原反应制备得SiC/C遗态陶瓷。采用TG-DTG、XRD和SEM等技术分别对材料的热解行为、物相构成和显微结构进行分析与表征,利用阿基米德法测定试样的显气孔率。结果表明:SiC/C遗态陶瓷继承苎麻纤维的天然结构形貌,其物相中包含有β-SiC相和石墨化程度较低的C相;由苎麻/SiO2前驱体A制备的试样组织结构疏松,界面结合较差,显气孔率高,纤维形貌更为完整;由苎麻/酚醛树脂/SiO2前驱体B制备的试样组织结构致密,界面结合较好,显气孔率低。
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| 关 键 词： | 苎麻纤维 溶胶-凝胶工艺 生物模板 SiC/C遗态陶瓷 |
Preparation process of SiC/C morph-genetic ceramics |
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| HE Xinhai,WANG Junbo,SHEN Mingqian,FU Chong,XU Jie,SU Xiaolei,YANG Minge.Preparation process of SiC/C morph-genetic ceramics[J].Ordnance Material Science and Engineering,2011,34(2):1-4. |
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| Authors: | HE Xinhai WANG Junbo SHEN Mingqian FU Chong XU Jie SU Xiaolei YANG Minge |
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| Affiliation: | 1(1.College of Mechanical & Electrical Engineering,Xi′an Polytechnic University,Xi′an 710048,China; 2.School of Mechatronics,Northwestern Polytechnical University,Xi′an 710072,China) |
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| Abstract: | Sol-gel processing was used to prepare ramie/SiO2 precursor A and ramie/phenolic resin/SiO2 precursor B with ramie fibers bio-template,then SiC/C morph-genetic ceramics were obtained though the carbothermal reduction of the precursor at 1 500 ℃ in vacuum.Thermo gravimetric analysis(TG-DTG),X-ray diffraction(XRD) and scanning electron microscope(SEM) were employed to analyze and characterize the pyrolysis behavior,phase composition and microstructure of the samples.And apparent porosity was measured by Archimend′s law.The results show that SiC/C morph-genetic ceramics inherit the original natural tracheid structure of ramie fibers,and the phase compositions are crystalline β-SiC phase and C phase with a low degree of graphitization.The samples prepared from ramie/SiO2 precursor A with loose organizational structure,poor bonding interface,high porosity and more completing morphology.The samples prepared from ramie/phenolic resin/SiO2 precursor B with dense organizational structure,good bonding interface,and low porosity. |
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| Keywords: | ramie fibers sol-gel processing bio-template SiC/C morph-genetic ceramics |
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