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Processing and performance of 2D fused-silica fiber reinforced porous Si_3N_4 matrix composites 被引量:1
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作者 Guifang Han Litong Zhang Laifei Cheng 《Journal of University of Science and Technology Beijing》 CSCD 2008年第1期58-61,共4页
Two-dimension (2D) fused-silica fiber reinforced porous silicon nitride matrix composites were fabricated using slurry impregnation and cyclic infiltration with colloidal silica sol. The microstructure and fracture ... Two-dimension (2D) fused-silica fiber reinforced porous silicon nitride matrix composites were fabricated using slurry impregnation and cyclic infiltration with colloidal silica sol. The microstructure and fracture surface were characterized by SEM, the mechanical behavior was investigated by three-point bending test, and the dielectric constant was also measured by impedance analysis. The microstructure showed that the fiber and the matrix had a physical bonding, forming a clearance interface. The mechanical behavior suggested that the porous matrix acted as crack deflection, and the fracture surface had a lot of fiber pull-out. However, the interlaminar shear strength was not so good. The dielectric constant of the composites at room temperature was about 2.8-3.1. The relatively low dielectric constant and non-catastrophic failure indicated the potential application in the radome materials field. 2008 University of Science and Technology Beijing. All rights reserved. 展开更多
关键词 porous matrix composites fused-silica fiber si3n4 mechanical behavior dielectric constant
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INTERFACIAL REACTION BEHAVIOUR AND JOINT STRENGTH OF TiC_p/Si_3N_4 COMPOSITE BONDED WITH Al FOIL
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作者 Zhou, Fei Li, Zhizhang Luo, Qifu 《中国有色金属学会会刊:英文版》 EI CSCD 1999年第1期117-122,共6页
1INTRODUCTIONTiCp/Si3N4compositeceramicshaveexcellentphysical,chemicalandmechanicalproperties,andtheyareap... 1INTRODUCTIONTiCp/Si3N4compositeceramicshaveexcellentphysical,chemicalandmechanicalproperties,andtheyareappliedwidelyinseve... 展开更多
关键词 si 3n 4 CERAMIC compositE al FOIL InTERFACIal REACTIOn metal JOInT CERAMIC JOInT
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High Temperature Creep behaviour of a Si_3N_4 Whisker Reinforced Al-Fe-V-Si Composite
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作者 Liangming PENG Shijie ZHU Haoran CHEN and Fugang WANG(Dept. of Materials Engineering,Dalian University of Technology, Dalian 116023, China)Zongyi MA and Jing BI(Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1998年第6期527-532,共6页
The creep behaviour of β-Si3N4 whisker reinforced Al-8.5Fe-1.3V-1.7Si composite has been investigated at the temperature 773 and 823 K. The results are characterized by high stress exponent and high apparent creep ac... The creep behaviour of β-Si3N4 whisker reinforced Al-8.5Fe-1.3V-1.7Si composite has been investigated at the temperature 773 and 823 K. The results are characterized by high stress exponent and high apparent creep activation energy The creep data can be interpreted based on the incorporation of a threshold Stress and a load transfer coefficient into the power-law creep equation. A good correlation between the normalized creep rate and normalized effective stress is available which demonstrates that the creep behaviour of both the alloy and the composite is controlled by the matrix lattice self-diffusion in AI. EXamination on microstructure shows that edge dislocations exist at the interfaces between two adjacent whiskers and the intedeces emit edge dislocations in parallel paired-columns. 展开更多
关键词 si al Fe High Temperature Creep behaviour of a si3n4 Whisker Reinforced al-Fe-V-si composite
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用Y_2O_3Al_2O_3SiO_2Si_3N_4钎料连接氮化硅复相陶瓷
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作者 周飞 李志章 罗启富 《材料研究学报》 EI CAS CSCD 北大核心 1999年第5期514-518,共5页
研究了用Y2O3Al2O3SiO2Si3N4 钎料对氮化硅复相陶瓷的连接. 对连接界面进行SEM、EPMA和XRD分析.接头强度随着保温时间、连接温度的增加而逐渐增加. 在达到峰值后,连接强度逐渐降低.在YAS钎... 研究了用Y2O3Al2O3SiO2Si3N4 钎料对氮化硅复相陶瓷的连接. 对连接界面进行SEM、EPMA和XRD分析.接头强度随着保温时间、连接温度的增加而逐渐增加. 在达到峰值后,连接强度逐渐降低.在YAS钎料中添加氮化硅, 可以降低接头界面的热应力,改善接头强度. 微观分析表明:接头强度的变化主要与界面反应和界面孔洞损伤有关. 展开更多
关键词 氮化硅 复相陶瓷 氧氮玻璃 连接强度 钎料
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PEO processing of AZ91Nd/Al_(2)O_(3) MMC-the role of alumina fibers 被引量:2
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作者 Ting Wu Carsten Blawert +4 位作者 Maria Serdechnova Polina Karlova Gleb Dovzhenko D.C.Florian Wieland Mikhail L Zheludkevich 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2022年第2期459-476,共18页
This work reports the influence of alumina fiber reinforcement of an AZ91Nd MMC(metal matrix composite)on the PEO coating formation process in a sodium phosphate-based electrolyte.By comparison with the pure AZ91Nd,th... This work reports the influence of alumina fiber reinforcement of an AZ91Nd MMC(metal matrix composite)on the PEO coating formation process in a sodium phosphate-based electrolyte.By comparison with the pure AZ91Nd,the evolution of alumina fiber during the processing and the characteristics of the resultant PEO coating were investigated.The voltage response as a function of processing time was changed.Lower voltage in the presence of alumina fiber is responsible for the lower coating thickness.The morphology and phase composition of the coatings are also influenced by the incorporation of the fiber.Firstly,the fiber is embedded in the coating and interrupts the continuity of the coating.With increasing processing time,the fiber is found to be reactively incorporated in the coating.The intention to produce a MgAl_(2)O_(4)containing coating is achieved and it is mainly accumulated near the coating surface.However,due to the low number of fibers,the Al content is overall still low and only near to the fibers the MgAl_(2)O_(4)spinel phase can form. 展开更多
关键词 Plasma electrolytic oxidation Mg alloy metal matrix composite al2O3 Mgal_(2)O_(4)
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