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| 1 | Advances in ultra-high temperature ceramics,composites,and coatings显示文摘Ultra-high temperature ceramics(UHTCs)are generally referred to the carbides,nitrides,and borides of the transition metals,with the Group IVB compounds(Zr&Hf)and TaC as the main focus.The UHTCs are endowed with ultra-high melting points,excellent mechanical properties,and ablation resistance at elevated temperatures.These unique combinations of properties make them promising materials for extremely environmental structural applications in rocket and hypersonic vehicles,particularly nozzles,leading edges,and engine components,etc.In addition to bulk UHTCs,UHTC coatings and fiber reinforced UHTC composites are extensively developed and applied to avoid the intrinsic brittleness and poor thermal shock resistance of bulk ceramics.Recently,high-entropy UHTCs are developed rapidly and attract a lot of attention as an emerging direction for ultra-high temperature materials.This review presents the state of the art of processing approaches,microstructure design and properties of UHTCs from bulk materials to composites and coatings,as well as the future directions. | Dewei NI Yuan CHENG Jiaping ZHANG Ji-Xuan LIU Ji ZOU Bowen CHEN Haoyang WU Hejun LI Shaoming DONG Jiecai HAN Xinghong ZHANG Qiangang FU Guo-Jun ZHANG | 2022 | Journal of Advanced Ceramics2022，11，1： | 9 |
| 2 | Mullite Oxidation Resistant Coating for SiC-coated Carbon/Carbon Composites by Supersonic Plasma Spraying显示文摘To improve the oxidation resistance of carbon/carbon (C/C) composites, mullite coating was prepared on the surface of SiC-coated C/C composites by supersonic plasma spraying. Phases and microstructures of mullite coating were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The coating primarily consists of a single phase of mullite (3Al2O3-2SiO2). The SEM results show that mullite coating was continuous and well bonded with the SiC inner layer without penetrating crack. Mullite coating exhibited good oxidation resistance. After 98.5 h oxidation at 1773 K and 9 thermal shock cycles between 1773 K and room temperature, the weight loss of the coated C/C composites was only 2.57%. | Chao Ma Hejun Li Heng Wu Qiangang Fu Can Sun Xiaohong Shi Yulei Zhang Zhengzhong Zhang Jun Tao Zhihai Han | 2013 | Journal of Materials Science & Technology2013，29，1： | 4 |
| 3 | Microstructure and oxidation resistance of SiC–MoSi_2 multi-phase coating for SiC coated C/C composites显示文摘In order to improve the anti-oxidation of C/C composites, a SiC–MoSi2multi-phase coating for SiC coated carbon/carbon composites(C/C)was prepared by low pressure chemical vapor deposition(LPCVD) using methyltrichlorosilane(MTS) as precursor, combined with slurry painting from MoSi2 powder. The phase composition and morphology were analyzed by scanning electron microscope(SEM) and X-ray diffraction(XRD) methods, and the deposition mechanism was discussed. The isothermal oxidation and thermal shock resistance were investigated in a furnace containing air environment at 1500 1C. The results show that the as-prepared SiC–MoSi2coating consists of MoSi2 particles as a dispersing phase and CVD–SiC as a continuous phase. The weight loss of the coated samples is 1.51% after oxidation at 1500 1C for 90 h, and 4.79% after 30 thermal cycles between 1500 1C and room temperature. The penetrable cracks and cavities in the coating served as the diffusion channel of oxygen, resulted in the oxidation of C/C composites, and led to the weight loss in oxidation. | Zibo He Hejun Li Xiaohong Shi Qiangang Fu Heng Wu | 2014 | Progress in Natural Science:Materials International2014，24，3： | 2 |
| 4 | Substrates and interlayer coupling effects on Mo1-xWxSe2 alloys显示文摘Two-dimensional(2D) transition metal dichalcogenides alloys are potential materials in the application of photodetectors over a wide spectral range due to their composition-dependent bandgaps. The study of bandgap engineering is important for the application of 2D materials in devices. Here, we grow the Mo1-xWxSe2 alloys on mica, sapphire and SiO2/Si substrates by chemical vapor deposition(CVD) method. Mo1-x Wx Se2 alloys are grown on the mica substrates by CVD method for the first time. Photoluminescence(PL) spectroscopy is used to investigate the effects of substrates and interlayer coupling force on the optical bandgaps of as-grown Mo1-xWxSe2 alloys. We find that the substrates used in this work have an ignorable effect on the optical bandgaps of as-grown Mo1-xWxSe2. The interlayer coupling effect on the optical bandgaps of as-grown Mo1-xWxSe2 is larger than the substrates effect. These findings provide a new way for the future study of the growth and physical properties of 2D alloy materials. | Fang Liang Hejun Xu Zuoyuan Dong Yafeng Xie Chen Luo Yin Xia Jian Zhang Jun Wang Xing Wu | 2019 | Journal of Semiconductors2019，40，6： | 2 |
| 5 | Determination of the residues of 50 anabolic hormones in muscle, milk and liver by very-high-pressure liquid chromatography–electrospray ionization tandem mass spectrometry显示文摘 | Yi Yang Bing Shao Jing Zhang Yongning Wu Hejun Duan | 2008 | Journal of Chromatography B2008，，5： | 2 |
| 6 | Multi-residual analysis of 16 β-agonists in pig liver, kidney and muscle by ultra performance liquid chromatography tandem mass spectrometry显示文摘 | Bing Shao Xiaofei Jia Jing Zhang Juan Meng Yongning Wu Hejun Duan Xiaoming Tu | 2008 | Food Chemistry2008，，3： | 1 |
| 7 | Effect of Spraying Power on Microstructure and Bonding Strength of MoSi2-based Coatings Prepared by Supersonic Plasma Spraying显示文摘 | Wu Heng Li Hejun Lei Qing | 2011 | Applied Surface Science2011，257，13： | 1 |
| 8 | MoSi2-based oxidation pro tective coatings for SiC-coated carbon/carbon composites pre pared by supersonic plasma spraying显示文摘 | Wu Heng Li Hejun Ma Chao | 2010 | J Eu Ceram Soc2010，30，15： | 1 |
| 9 | MG63 Osteoblast-like Cells Growth Behaviour on Carbon/Carbon Composites with Different Carbon Matrixes显示文摘During the process that implant materials are used for bone replacement,the cell responses to implant materials determine the long-term stability of bone replacement.The microstructure of implant materials is considered as a critical factor that influences the cell responses.Carbon/Carbon composites(C/C composites) are novel implant materials,but there are few reports on the effect of their microstructure,especially the carbon matrixes and holes,on cell behavior.In this paper,C/C composites with different carbon matrixes are prepared by chemical vapor infiltration and pressure impregnation carbonization technique,respectively.The structure of holes is analyzed.The cell responses to C/C composites with different carbon matrixes are evaluated with MG63 osteoblast-like cells.The morphologies of MG63 osteoblast-like cells on the surface of C/C composites,especially in the holes are assessed by scanning electron microscope,and cell proliferation behavior is evaluated by 3-[4,5-dimethylthiozol-2-yl]-2,5-diphenyltetrazolium bromide(MTT) assay. The results show that MG63 osteoblast-like cells have a lamellar morphology with similar sizes and spreading areas as well as the same proliferation behaviors for C/C composites with different carbon matrixes.Carbon matrix shows unapparent influence on the cell growth behavior.Besides,MG63 osteoblast-like cells have various interactions with the holes of C/C composites.The cells stride over the holes with 6~8μm in size,and connect with each other or grow along the curvature wall of the holes with a size of 30-40μm;the cells present three-dimensional morphologies inside the holes and display circular shapes along the ridge of the holes.Diverse cell-material interactions are found according to the size and position of the holes,which provides theoretical foundation for the microstructure design of clinical C/C composites. | ZHANG Leilei LI Hejun LI Kezhi ZHAO Xueni WU Heng CAO Sheng | 2011 | Chinese Journal of Mechanical Engineering2011，24，2： | 1 |
| 10 | Effact of spraying power on microstructure and bonding strength of MoSia-based coatings prepared by supersonic plasma spraying显示文摘 | Wu Heng Li Hejun Lei Qing | 2011 | App Surf Sci2011，257，13： | 1 |
| 11 | Multi-residual analysis of 16 β-agonists in pig liver, kidney and muscle by ultra performance liquid chromatography tandem mass spectrometry显示文摘 | Bing Shao Xiaofei Jia Jing Zhang Juan Meng Yongning Wu Hejun Duan Xiaoming Tu | 2008 | Food Chemistry2008，，3： | 1 |
| 12 | Determination of the residues of 50 anabolic hormones in muscle, milk and liver by very-high-pressure liquid chromatography–electrospray ionization tandem mass spectrometry显示文摘 | Yi Yang Bing Shao Jing Zhang Yongning Wu Hejun Duan | 2008 | Journal of Chromatography B2008，，5： | 1 |
| 13 | Comparative Study on Analysis and Fitting of Pudong Chicken Growth Curve显示文摘The objective of this paper was to study the growth and development laws of Pudong chicken. The growth curve of Pudong chicken(cock and hen) from 0 to 20 weeks was analyzed and fitted with three models(Gompertz, Logistic and Bertalanffy). It was concluded that the growth curves were appropriately fitted with three models, and fitness degree(R2)in growth data of Pudong chicken were all above 0.992. The Bertalanffy model was the most effective with the highest R2 for cock(R2=0.995) and hen(R2=0.999), respectively. With further analysis of fitted parameters for Logistic model of cock, 0-3 weeks' fitted values were significantly greater than measured values and 4-8 weeks ' fitted values were lower than measured values. Compared with Logistic model, the values calculated by Gompertz model and Bertalanffy model were more coincident with the practical measuring values. For hens, 0-3 weeks ' fitted values of Logistic model were significantly greater than measured values and 0-2 weeks ' fitted values of Gompertz model were slightly greater than measured values, while the values calculated by Bertalanffy model best matched the observed val-ues from actual measure. The results showed that Bertalanffy model used to estimate the growth weight of Pudong chicken was the best while Logis-tic model was the worst. So the fitness and analysis of growth curves of Pudong chicken are valid, which may be adopted to predict growth and de-velopment laws of Pudong chicken and provide reliable data for precise feeding and breeding. | Lu Xuelin Zhao Lele Li Hejun Xu Dong Wu Haomin Xu Weibin | 2018 | Animal Husbandry and Feed Science2018，10，3： | 1 |
| 14 | Petrogenesis and Tectonic Implications of A-type Granites in Zhaheba in the East Junggar Region of Xinjiang,China:Evidence from Geochronology,Geochemistry and Sr-Nd Isotopic Compositions显示文摘The magma source,petrogenesis,tectonic setting and geochronology of the late Paleozoic A-type granites widely exposed in the Zhaheba area,East Junggar,have thus far not been well-constrained.A better understanding of these issues will help to reveal the magmatic processes and continental growth of Central Asia.The A-type granites in Zhaheba include the Ashutasi alkaline granites and the Yuyitasi syenogranites,which were emplaced at 321.5±4.8 Ma and 321.7±0.6 Ma,respectively.The major rock-forming minerals are orthoclase,perthite,arfvedsonite and quartz,which exhibit the following principal geochemical characteristics of A2-type granites.(1)Their REE distribution curves each exhibit a‘V’-shaped pattern and a marked depletion in Eu.They are rich in large-ion lithophile elements Rb,Th and U as well as high-field-strength elements Nb,Ta,Zr and Hf,but significantly depleted in Ba,Sr,P and Ti.(2)Their(^(87)Sr/^(86)Sr)i values(0.7021-0.7041),εNd(t)values(4.57-5.16)and REE distribution patterns are in basic agreement with those of the Kalamaili A-type granite belt in East Junggar.The T DM2 values of the alkaline granites and syenogranites range from 661 to 709 Ma.The A-type granites may be the products of upwelling asthenosphere-triggered partial melting of immature lower crust.The alkaline granites were late-stage products of crystallization and differentiation.Compared to the syenogranites,the alkaline granites are significantly lower in K_(2)O,Na_(2)O,Al_(2)O 3,FeO,MgO and CaO,but significantly higher in incompatible elements(e.g.,SiO_(2),Rb,and Sr).The magmatic crystallization temperatures of the syenogranites and alkaline granites are 874℃ and 819℃,respectively.As their age gradually decreases(peak ages:322 Ma and 307 Ma,respectively),there is a gradual decrease in the T_(DM2)of the A-type granites and a gradual increase in theεNd(t)value from the Ulungur belt to the Kalamaili belt in East Junggar.The study of A-type granites is therefore one of the keys to understanding the laws and mechanisms of crustal accretion during the Phanerozoic period,as well as also being of great significance for understanding the Paleozoic accretion. | TANG Hejun MENG Guixiang WU Zhenhan WANG Zhaolin DENG Zhen YAN Jiayong QI Guang XUE Ronghui | 2022 | Acta Geologica Sinica(English Edition)2022，96，3： | 1 |
| 15 | Preparation of low-density polyethylene / low-temperature expandable graphite composites with high thermal conductivity by an in situ expansion melt blending process 显示文摘 | Wu Hejun Lu Canhui Zhang Wei | 2013 | Materials & Design2013，52，： | 1 |
| 16 | Microstructures and Re- sistance of ZrC Coating for SiC-Coated Carbon/Carbon Composites Prepared by Supersonic Plasma Spraying 显示文摘 | Wu Heng Li Hejun Fu Qiangang | | Journal of Therrmtl0，，61： | 1 |
| 17 | Pattern-based event detection in sensor networks显示文摘 | Wenwei Xue Qiong Luo Hejun Wu | 2012 | Distributed and Parallel Databases2012，30，1： | 1 |
| 18 | Multi-residual analysis of 16 β-agonists in pig liver, kidney and muscle by ultra performance liquid chromatography tandem mass spectrometry显示文摘 | Bing Shao Xiaofei Jia Jing Zhang Juan Meng Yongning Wu Hejun Duan Xiaoming Tu | 2008 | Food Chemistry2008，，3： | 1 |
| 19 | Wehrl's entropy and noise显示文摘 | Wu Hejun Xia Yuje | 1997 | Chiese Physics Letter1997，，14： | 1 |
| 20 | MoSirbased oxidation protective coatings for SiC-coated carbon/carbon composites prepared by supersonic plasma spraying 显示文摘 | Wu Heng Li HeJun Ma Chao | 2010 | Journal of the European Ceramic Society2010，30，15： | 1 |
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