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Journal of Materials Science & Technology 2017年第5期33卷 481-486页

作者： Dong huang Mingyu Zhang qizhong huang Liping Wang Kai Tong College of Materials Science and Engineering Hunan University State Key Laboratory for Powder Metallurgy Central South University

CJC-ZrB2-ZrC-SiC composites were fabricated by polymer infiltration and pyrolysis （PIP） with a preform of G/ZrB2. The carbon fibers and the resin carbon were coated with ceramic layer after PIP in the com- posites. The composite presents a pseudo-plastic fracture due to deflection of cracks and pullout of fibers. The composite has a higher bending strength by this method in comparison with the conventional PIP process due to fewer heat treatment cycles. The static oxidation test shows that the mass loss of the composites is no more than 1% after 20 rain oxidation at 1100 ~C. The ＂core-shell＂ structure between ZrC-SiC ceramic and other phases plays a positive role in preventing the inward diffusion of oxygen. The ablation resistance of the C/C-ZrB2-ZrC-SiC composite samples was tested using a plasma generator. After ablation for 120 s, the mass and linear ablation rates of the composites are 4.65 mg cm-2 s-1 and 2.46 μm s-1, respectively. The short carbon layer shows a better ablation resistance than the nonwoven carbon fabric layer after the ceramic coating is peeled off because of its higher ceramic content.

关键词： C/C composite Ceramic-matrix composites High temperature corrosion

Microstructure and Mechanical Properties of C/C-ZrC-SiC Composites Fabricated by Reactive Melt Infiltration with Zr,Si Mixed Powders

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Journal of Materials Science & Technology 2013年第8期29卷 702-710页

作者： Xin Yang Zhean Su qizhong huang Xiao Fang Liyuan Chai School of Metallurgical Science and Engineering Central South University State Key Laboratory of Powder Metallurgy Central South University

To meet the increasing demand for advanced materials capable of operation over 2000 ℃ for future thermal protection systems application, C/C-ZrC-SiC composites were fabricated by reactive melt infiltration （RMI） with Zr, Si mixed powders as raw materials. The structural evolution and formation mechanism of the C/C- ZrC-SiC composites were discussed, and the mechanical property of the as-prepared material was investigated by compression test. The results showed that after the RMI process, a special structure with ZrC-SiC multi-coating as outer layer and ZrC-SiC-PyC ceramics as inner matrix was formed. ZrC and SiC rich areas were formed in the composites and on the coating surface due to the formation of Zr-Si intermetallic compounds in the RMI process. Mechanical tests showed that the average compression strength of the C/C-ZrC-SiC composites was 133.86 MPa, and the carbon fibers in the composites were not seriously damaged after the RMI process.

关键词： Carbon/carbon composites Reactive melt infiltration Coating ZrC SiC

QUASICRYSTALLINE　AND　CRYSTALLINE　PHASES　IN　RAPIDLY　SOLIDIFIED　Al₃₃Cu₁₀Fe₂₄Ti₃₃　ALLOY　POWDERS

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中国有色金属学会会刊：英文版 1995年第4期5卷 89-94页

作者： Wu, Lijun Chen, Zhenhua Hu, Wangyu huang, qizhong Zhao, Lihua Hunan Univ Changsha China

ＱＵＡＳＩＣＲＹＳＴＡＬＬＩＮＥＡＮＤＣＲＹＳＴＡＬＬＩＮＥＰＨＡＳＥＳＩＮＲＡＰＩＤＬＹＳＯＬＩＤＩＦＩＥＤＡｌ３３Ｃｕ１０Ｆｅ２４Ｔｉ３３ＡＬＬＯＹＰＯＷＤＥＲＳＷｕＬｉｊｕｎ；ＣｈｅｎＺｈｅｎｈｕａ；ＨｕＷａｎ... 详细信息

ＱＵＡＳＩＣＲＹＳＴＡＬＬＩＮＥＡＮＤＣＲＹＳＴＡＬＬＩＮＥＰＨＡＳＥＳＩＮＲＡＰＩＤＬＹＳＯＬＩＤＩＦＩＥＤＡｌ３３Ｃｕ１０Ｆｅ２４Ｔｉ３３ＡＬＬＯＹＰＯＷＤＥＲＳＷｕＬｉｊｕｎ；ＣｈｅｎＺｈｅｎｈｕａ；ＨｕＷａｎｇｙｕ；Ｈｕａ...

关键词： quasicrystal crystalline phases Al33Cu10Fe24Ti33 alloy rapidly solidified powders

RELATIONSHIP　OF　THE　PROPERTIES　OF　HOT－PRESSING　C－BC_4－SiC　COMPOSITE　WITH　THE　CONTENT　OF　ADDITIVE　Al

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中国有色金属学会会刊：英文版 1995年第3期5卷 93-96页

作者： huang, qizhong Tan, Ping Yang, Qiaoqin huang, Baiyun Lu, Haibo Yu, Guowen Central South Univ of Technology Changsha China

ＲＥＬＡＴＩＯＮＳＨＩＰＯＦＴＨＥＰＲＯＰＥＲＴＩＥＳＯＦＨＯＴ－ＰＲＥＳＳＩＮＧＣ－ＢＣ_４－ＳｉＣＣＯＭＰＯＳＩＴＥＷＩＴＨＴＨＥＣＯＮＴＥＮＴＯＦＡＤＤＩＴＩＶＥＡｌ￥Ｈｕａｎｇ，Ｑｉｚｈｏｎｇ；Ｔａｎ，Ｐｉｎ... 详细信息

ＲＥＬＡＴＩＯＮＳＨＩＰＯＦＴＨＥＰＲＯＰＥＲＴＩＥＳＯＦＨＯＴ－ＰＲＥＳＳＩＮＧＣ－ＢＣ_４－ＳｉＣＣＯＭＰＯＳＩＴＥＷＩＴＨＴＨＥＣＯＮＴＥＮＴＯＦＡＤＤＩＴＩＶＥＡｌ￥Ｈｕａｎｇ，Ｑｉｚｈｏｎｇ；Ｔａｎ，Ｐｉｎｇ；Ｙａｎｇ，Ｑｉａｏｑｉｎ＋；Ｈ?..

关键词： additive Al C-B4C-SiCcomposite hot-pressing property

EFFECT OF BORON ON MICROSTRUCTURE AND PROPERTIES OF Ti-N FILM

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中国有色金属学会会刊：英文版 1997年第4期7卷 98-102页

作者： Yang, Qiaoqin Zhao, Lihua Xiao, Hanning Zhao, Nanfang huang, qizhong Hunan Univ Changsha China

ＥＦＦＥＣＴＯＦＢＯＲＯＮＯＮＭＩＣＲＯＳＴＲＵＣＴＵＲＥＡＮＤＰＲＯＰＥＲＴＩＥＳＯＦＴｉＮＦＩＬＭ①ＹａｎｇＱｉａｏｑｉｎ，ＺｈａｏＬｉｈｕａ，ＸｉａｏＨａｎｎｉｎｇＭａｔｅｒｉａｌＴｅｓｔａｎｄＲｅｓｅａｒｃ... 详细信息

ＥＦＦＥＣＴＯＦＢＯＲＯＮＯＮＭＩＣＲＯＳＴＲＵＣＴＵＲＥＡＮＤＰＲＯＰＥＲＴＩＥＳＯＦＴｉＮＦＩＬＭ①ＹａｎｇＱｉａｏｑｉｎ，ＺｈａｏＬｉｈｕａ，ＸｉａｏＨａｎｎｉｎｇＭａｔｅｒｉａｌＴｅｓｔａｎｄＲｅｓｅａｒｃｈＣｅｎｔｅｒ，ＨｕｎａｎＵｎｉｖ...

关键词： boron Ti N film nanocrystalline multiphase composite

Influence of Preparation Technology on the Structure and Phase Composition of MoSi_2-Mo_5Si_3 /SiC Multi-coating for Carbon/Carbon Composites

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Journal of Materials Science & Technology 2010年第2期26卷 106-112页

作者： Xin Yang Yanhong Zou qizhong huang Zhean Su Mingyu Zhang Xin Chang Zhiyong Xie State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China Materials Science and Engineering Post-doctoral Research Center Central South University Changsha 410083 China

Oxidation protective MoSi2-MosSi3/SiC multi-coatings for carbon/carbon composites were prepared by chemical vapor reaction and slurry-sintering method. The influence of preparation technology on the structure and phase composition of the coating was investigated by scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS） and X-ray diffraction （XRD） analyses, and then their relationship was discussed. The results indicate that the Si/Mo ratio of the slurry and sintering processing were two main factors that significantly affected the structure and phase composition of the multi-coating. Appropriate sintering process and relatively high Si/Mo ratio were essential for preparing the multi-coating with dense structure and favorable phase composition. After being sintered at 1723 K for 2 h and with the Si/Mo ratio of the slurry being 4.5 （weight ratio）, a dense structure accompanied by favorable phase composition of the coating can be obtained. When heat treated at 2373 K for I h, this coating became more compact and continuous. Oxidation tests （performed at 1623 and 1823 K） demonstrated that both of these two obtained multi-coatings exhibited better anti-oxidation property than single layer SiC coating.

关键词： Carbon/carbon composites Anti-oxidation coating SiC

Controlling the Si/C ratio in SiC matrix based on the modified polymethysilane for C/C-SiC composites with enhanced mechanical properties

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Journal of Advanced Ceramics 2024年第2期13卷 220-236页

作者： Mingdong Liao Xiebo Hu Chenghao Zhong Ping Xu Xiaodong Wang Ze Zhang Peng Zhou Mingyu Zhang Zhean Su qizhong huang National Key Laboratory of Science and Technology on High-Strength Structural Materials Central South UniversityChangsha 410083China

Fabricating SiC matrix with controllable Si/C ratio for C/C-SiC composites via precursor infiltration and pyrolysis is difficult to realize due to the absence of suitable ***,SiC precursors with Si-rich(Si/C=1.23),nearstoichiometric(Si/C=1.01),and C-rich(Si/C=0.88)pyrolyzed ceramics at 1200℃ were successfully synthesized by the novel modification of *** structure and ceramization of synthesized SiC precursors were studied,and C/C-SiC composites with similar Si/C ratio in SiC matrix were also *** results revealed that the defects and Young’s modulus of SiC matrix and the thermal residual stress on pyrolytic carbon coated carbon fiber were determined by the Si/C *** a result,the Si/C ratio exerted significant effects on the crack deflection behavior and the mechanical properties of the *** composites with near-stoichiometric SiC matrix showed excellent mechanical properties because of the effective crack deflection and the moderate Young’s modulus of their SiC *** flexural strength,flexural modulus,and compressive strength were 423±27 MPa,33.41±4.52 GPa,and 393±8 MPa,***,after a heat treatment at 1600℃,the role of carbon fiber toughening was improved and accompanied by a decrease in mechanical properties for all composites,which was attributed to the increased defects in SiC matrix and the damaged interfaces by the thermal residual stress.

关键词： SiC precursor Si/C ratio polymethysilane C/C–SiC composites mechanical properties

TEM STUDY OF C-B_4C-SiC COMPOSITES WITH SILICON ADDITIVE

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Acta Metallurgica Sinica(English Letters) 1995年第2期8卷 92-96页

作者： ZHAO Lihua WU Lijun huang qizhong YANG Qiaoqin 1)(Material Research and Test Center,Hunan University,Changsha,China)2)(Powder Metallurgy Research Institute,Center-South University of Technology,Changsha,China)3)(Laboratory of Atomic Imaging of Solids, Ins Hunan Univ Changsha China

C-B4C-SiC composites with silicon additive obtained by the hot press sintering method are studied by means of transmission electron microscopy(TEM).When the specimens are heated to 1800℃,their structure does not *** the specimens are heated to 2000℃,carbon begins to graphitize. Moreover,two monoclinic phases are *** monoclinic phase named as the M phase belongs to C-center monoclinic lattice with a=0.90nm,b=0.59nm,c=0.54nm and β=119.3°.The other monoclinic phase named as the Ml phase also belongs to C-center monoclinic lattice but with a=0.85nm,b=0.49nm,c=0.53nm and β=123.6°.

关键词： C-B_4C-SiC composite electron microscopy

Simple and rapid conversion of silicon carbide to nanodiamonds at ambient pressure

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Journal of Materials Science & Technology 2021年第35期94卷 230-238页

作者： Cheng Yang Bingqiang Wei Kejian He Ping Xu Xiangmin Xie Kai Tong Chen Zeng Yafeng Wang Xiaodong Wang Jinping Liu Mingyu Zhang Zhe'an Su qizhong huang State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Advanced Research Center.Central South University Changsha 410083China Hunan Changyu Science and Technology Development Co. Ltd.Changsha 410600China

Nanodiamonds(NDs)were prepared under ambient pressure by sublimation decomposition of silicon carbide in an intermediate frequency furnace for only 8 *** synthesis proceeded in the temperature range of 2600-2800℃ without any catalyst or highly active gas components(such as H2,alkane,and halogen).The conversion began at 2600℃ and produced NDs with particle sizes in the range of 1-5 nm with a uniform particle shape and excellent *** linear reaction kinetics allowed for rapid transformation to any depth with reasonable control of the *** linear rate constant(K_(l))for the reaction at 2800℃ was 37.5 mm/h,which is 31.2 times that of the reaction at 2600℃.The Si C sublimation decomposition produced carbon atoms that filled the Si C lattice vacancies or were combined with the suspended carbon chain bonds to form sp3 carbon,while the diffusion of amorphous carbon atoms promoted nucleation and growth of ***-resolution transmission electron microscopy analysis indicated that the NDs were separated from the Si C matrix by break-off due to propagation of the reaction *** Si C sublimation decomposition method is considered simple,fast,environmentally friendly and promising for industrial-scale production.

关键词： n-diamond SiC Nanodiamond Sublimation decomposition

苯甲酸盐类成核剂改性煤基高流动抗冲共聚聚丙烯的研究

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合成树脂及塑料 2022年第3期39卷 13-17页

作者：黄起中国家能源集团国能榆林化工有限公司陕西榆林719000

研究了苯甲酸盐类成核剂NA-1和NA-2对煤基高流动抗冲共聚聚丙烯K7726H的结晶性能、力学性能及熔体流动速率等的影响。结果表明:两种成核剂均可提高K7726H的结晶性能,NA-1和NA-2质量分数为2.0×10^(-3)时,结晶温度从纯聚丙烯的124.2℃分... 详细信息

研究了苯甲酸盐类成核剂NA-1和NA-2对煤基高流动抗冲共聚聚丙烯K7726H的结晶性能、力学性能及熔体流动速率等的影响。结果表明:两种成核剂均可提高K7726H的结晶性能,NA-1和NA-2质量分数为2.0×10^(-3)时,结晶温度从纯聚丙烯的124.2℃分别提升至131.4,129.2℃,结晶度从43.2%分别提升至50.3%,49.9%;两种成核剂均可提高K7726H的拉伸强度、弯曲模量,但成核剂NA-1可提升其冲击强度,而NA-2使其冲击强度略有降低;不同成核剂的引入对K7726H的熔体流动速率影响不大,即成核剂的引入不需要调整聚丙烯的加工工艺。

关键词：抗冲共聚聚丙烯成核剂苯甲酸盐类高流动力学性能