http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
M. Q. Zeng,J. L. Tu,M. Zhu,W. Wang,J. W. Liu,Z. C. Lu 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.9
The effects of plasma discharge intensity on the microstructure evolution of ball-milled tungsten (W)–carbon (C)–cobalt (Co)mixtures and the formation mechanism of ultrathin plate-like tungsten carbide (WC) grains prepared by ball milling with andwithout plasma discharge were investigated. It was found that increasing the plasma discharge intensity during ball millingobviously promoted the formation of a thin flake-like W phase because of the electroplasticity effect and simultaneouslylowered the carburization temperature between W and C. A combination of high hardness and transverse rupture strength of92.9 HRA and 3659 MPa, respectively, was obtained for the WC–8Co alloy fabricated by plasma milling at a gas pressure of5 × 103 Pa with a dielectric barrier discharge layer thickness of 3 mm. These properties were mainly attributed to the markedlylowered activation energy of the WC phase and generation of highly oriented ultrathin plate-like WC grains by plasma milling. The combination of the flake-like structure of the plasma-milled W aggregate and high specific interfacial area and shortdiffusion distance of W/C were readily inherited by the ultrathin plate-like WC grains in the sintered WC–Co hardmetals.
J. He,Q.Z. Cai,D. Zhu,Q. Luo,D.Q. Zhang,X.W. Li,X. Zhao,W. Sun 한국물리학회 2011 Current Applied Physics Vol.11 No.1
A WO_3/TiO_2 composite film was in-situ prepared in tungstate electrolyte and characterized by Electron microscopy, X-ray diffraction, UV―Vis spectrophotometer and Photoluminescence. The oxide film consists of mixture phases of anatase and rutile, showing porous structures and metallurgical bond with substrate. With the incorporation of WO_3 into TiO_2, the optical absorption edge of TiO_2 filmwas shifted to longer wavelength slightly and the separation between electrons and holes was promoted effectively. WO_3/TiO_2 composite film with increased photo quantum efficiency will be promising in the treatment of environmental pollutants.
Locating a weakened interface in a laminated elastic plate
Zhu, J.,Yang, J.S.,Chen, W.Q. Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.41 No.6
We study thickness-shear (TSh) free vibrations of an unbounded, laminated elastic plate with three layers of different materials. One of the two interfaces is slightly weakened as described by the shear-lag model that allows the displacement to be discontinuous across the interface. A frequency equation is obtained from the linear theory of elasticity. A perturbation solution of the frequency equation is obtained from which the frequency shifts of TSh modes due to the weakened interface can be calculated. It is shown that the frequency shifts of TSh modes of different orders are different, and they satisfy different conditions when different interfaces are weakened. These conditions are obtained which can potentially be used as criteria for determining specifically which interface is weakened.
Zhu, W.,Liu, X. Q.,Hou, X.,Chen, J.,Kim, C.,Xu, K. Royal Society of Chemistry 2014 Catalysis Science & Technology Vol.4 No.4
Using density functional theory (DFT), adsorption of O-2 and co-adsorption of O-2 and CCl4 on (ZnS)(n) clusters (n = 6, 7, 11, 12, 13, 15, 16, 17, 25, 26) and the mechanism of oxidative decomposition of CCl4 on a ZnS nanocluster were investigated. The decomposition of CCl4 without the ZnS cluster was also studied for comparison. The ZnS cluster achieved a significant catalytic effect during the oxidative decomposition of CCl4. It is found that CCl4 in gas phase undergoes a homolytic dissociation process with the activation by ZnS, reacting with O-2 to produce a CCl3 center dot radical and a ClOO center dot radical first. CO2 and Cl-2 are identified as the final neutral reaction products, while COCl2, CO and Cl2O are produced as intermediates. The released energy of the total reaction, 149.83 kcal mol(-1), is sufficient to afford the transition energy of the cataluminescence, based on which a novel and sensitive gas sensor for the determination of CCl4 could be constructed.
Antiferromagnetic spin reorientation transition in epitaxial NiO/CoO/MgO(001) systems
Zhu, J.,Li, Q.,Li, J. X.,Ding, Z.,Liang, J. H.,Xiao, X.,Luo, Y. M.,Hua, C. Y.,Lin, H.-J.,Pi, T. W.,Hu, Z.,Won, C.,Wu, Y. Z. American Physical Society 2014 Physical review. B, Condensed matter and materials Vol.90 No.5
Structural damage detection by principle component analysis of long-gauge dynamic strains
Q. Xia,Y.D. Tian,X.W. Zhu,D.W. Xu,J. Zhang 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.54 No.2
A number of acceleration-based damage detection methods have been developed but they havenot been widely applied in engineering practices because the acceleration response is insensitive to minordamage of civil structures. In this article, a damage detection approach using the long-gauge strain sensingtechnology and the principle component analysis technology is proposed. The Long gauge FBG sensor hasits special merit for damage detection by measuring the averaged strain over a long-gauge length, and it canbe connected each other to make a distributed sensor network for monitoring the large-scale civilinfrastructure. A new damage index is defined by performing the principle component analyses of thelong-gauge strains measured from the intact and damaged structures respectively. Advantages of the longgauge sensing and the principle component analysis technologies guarantee the effectiveness for structuraldamage localization. Examples of a simple supported beam and a steel stringer bridge have beeninvestigated to illustrate the successful applications of the proposed method for structural damage detection.
Activation of antiferromagnetic domain switching in exchange-coupled Fe/CoO/MgO(001) systems
Li, Q.,Chen, G.,Ma, T. P.,Zhu, J.,N'Diaye, A. T.,Sun, L.,Gu, T.,Huo, Y.,Liang, J. H.,Li, R. W.,Won, C.,Ding, H. F.,Qiu, Z. Q.,Wu, Y. Z. American Physical Society 2015 Physical review. B, Condensed matter and materials Vol.91 No.13
Locating a weakened interface in a laminated elastic plate
J. Zhu,J.S. Yang,W.Q. Chen 국제구조공학회 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.41 No.6
We study thickness-shear (TSh) free vibrations of an unbounded, laminated elastic plate with three layers of different materials. One of the two interfaces is slightly weakened as described by the shear-lag model that allows the displacement to be discontinuous across the interface. A frequency equation is obtained from the linear theory of elasticity. A perturbation solution of the frequency equation is obtained from which the frequency shifts of TSh modes due to the weakened interface can be calculated. It is shown that the frequency shifts of TSh modes of different orders are different, and they satisfy different conditions when different interfaces are weakened. These conditions are obtained which can potentially be used as criteria for determining specifically which interface is weakened.