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| 1 | LASER LIFT-OFF OF GaN THIN FILMS FROM SAPPHIRE SUBSTRATES显示文摘Gallium Nitride film was successfully separated from sapphire substrate by laser radiation. The absorption of the 248nm radiation by the GaN at the interface results in rapid thermal decomposition of the interfacial layer, yielding metallic Ga and N2 gas. The substrate can be easily removed by heating above the Ga melting point (29℃). X-ray diffraction, atomic force microscopy and Photoluminescence of CaN before and after lift-off process have been performed, which demonstrated that the separation and transfer process do not alter the structural quality of the GaN films. And further discussions on the threshold energy and crack-free strategies of laser lift-off process have also been presented. | J. Xu, R. Zhang, Y.P. Wang, X.Q. Xiu, S.L. Gu, B. Shen, Y. Shi, Z.G. Liu and Y.D. Zheng (Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 10 |
| 2 | EFFECT OF STRUCTURAL PARAMETERS ON THE THERMAL STRESS OF A NiFe_(2)O_(4)-BASED CERMET INERT ANODE IN ALUMINUM ELECTROLYSIS显示文摘Inert anode has been a hot issue in the aluminum industry for many decades. With the help of FEA(finite element analysis) software ANSYS,a model was developed to simulate the thermal stress distribution working condition of an inert anode. To reduce its thermal stress,the effect of some parameters on the thermal stress distribution was investigated,including the anode height,the anode radius,the hole depth,the hole radius,and the radius of inner chamfer and outer chamfer. The results showed that in the actual working condition of an inert anode,there existed a large axial tensile stress near the tangent interface between the anode and bath,which was the major cause of anode breaking. Increasing the anode height and reducing the hole depth properly seemed to be beneficial for the stress distribution. With the increase of anode radius,the stress distribution became better first and then deteriorated,the reasonable value was between 0.045 to 0.06m. The hole radius had a significant effect on the stress and a smaller radius would reduce the thermal stress. The effect of the radius of the inner chamfer and the outer chamfer was less than other parameters. | J. Li Z.G. Wang Y.Q. Lai Y.Y. Wu S.L. Ye | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，2： | 4 |
| 3 | FERROELECTRIC CHARACTERISTICS OF SrBi_2Ta_2O_9 THIN FILMS ANNEALED IN FORMING GAS显示文摘The degradation behavior of SrBi2 Ta2O9 (SBT) thin films annealed in forming gas (5%H2 +95%N2) was investigated. The ferroelectric remnant polarization P. of SBT had a severe decrease in the containing H2 atmosphere at 400℃. SEM results showed that Bi could be reduced from SBT thin films for the effect of H2. The reduction role increased with a rise of annealing temperature. SBT thin films lost their ferroelectricity when the annealing temperature was above 450℃. It implied that the degradation of P. value or the disappearance of ferroelectricity in SBT thin films had the relationship with the reductive amounts of Bi in SBT. H2 played an important role in degradation of ferroelectric SBT thin films. This role could be attributed to its strong reduction activity during forming gas annealing. | D.S. Wang, T. Yu and A. Hu (Department of Physics & National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China) D. Wu, A.D. Li, Z.G. Liu and N.B. Ming (Department of Material Science and Engineering & National Laboratory | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 4 |
| 4 | EFFECT OF IRON ON FORMATION OF MECHANICALLY ALLOYED NiAl ALLOY AND ITS MECHANICAL PROPERTIES显示文摘EFFECTOFIRONONFORMATIONOFMECHANICALLYALLOYEDNiAlALLOYANDITSMECHANICALPROPERTIESJ.T.Guo;L.Z.Zhou;Z.G.LiuandW.M.Yin(Institnteof... | J.T. Guo L.Z. Zhou Z.G. Liu and W.M. Yin(Institnte of Metal Research,Chinese Academy of Sciences,Shenyang 110015, China) | 1996 | Acta Metallurgica Sinica(English Letters)1996，9，6： | 3 |
| 5 | SEPARATION OF Ce(Ⅳ) AND Th(Ⅳ) FROM RE(Ⅲ) IN HNO_3 SOLUTION BY CYANEX 923 EXTRACTANT显示文摘1.IntroductionStraightchainalkylphosphineoxidemixtureCyanex923isonecommercialextractantsdevelopedbyCytecCanadaInc..ComparedwithotherphosphinereagelltsuchasTOPO,theextractatlthajsseveraladvantagesincludinglittleliablehydrolyzation,lowsolubilityinaqueo... | J. Lu and D.Q. Li(Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, The Chinese Academy of Sciences, Changchun 130022, China)Z.G. Wei and Z.C. Jiang(Department of Chemistryt Wuhan University, Wuhan 430072, China)Ma | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，2： | 3 |
| 6 | HIGH-TEMPERATURE LOW-CYCLE FATIGUE BEHAVIOR OF NICKEL-BASED SUPERALLOY GH4049显示文摘1.IntroductionGH4049isawroughtnickelbasedsuperaloyinwhichγ′hasbeenidentifiedastheprimarystrengtheningphase.Sincethisaloyexh... | Chen, L.J. Yao, G. Wang, Z.G. Tian, J.F. | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，1： | 3 |
| 7 | LOW CYCLE FATIGUE BEHAVIOR OF AZ91HP ALLOY IN AS HIGHP RESSURE DIE CASTING显示文摘Fully reversed total strain-controlled low-cycle fatigue tests were conducted at room temperature in air to study fatigue behavior of AZ91HP in as high pressure die casting and subsequently heat treatments. All the specimens in different heat histories exhibited cyclic strum hardening in different degrees. It was difficult to distinguish the fatigue behaviors of the die-casting specimens from the solution-aging specimens. However the solution treated specimens showed longerfatigue life at high strum amplitude and shorter fatigue life at low strain amplitude than die-casting and the solution-aging specimens though they had the lowest yield strength with higher strain hardening. Fatigue fracture surfaces for strain amplitude larger than 0.005 showed very similar to those of the monotonic tensile tests. The SEM examination revealed that regions of fatigue crack growth and final fracture could be characterized by quasi-cleavage mech anisms, but some shallow dimples, slip bands and secondary cracks were found on the fracture surface in the fracturs crack growth areas. | Liu, Z. Xu, Y.Y. Wang, Z.G. Wang, Y. Liu, Z.Y. | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，4： | 3 |
| 8 | Safety and radiation-enhancing effect of sodium glycididazole in locoregionally advanced laryngeal cancers previously treated with platinum-containing chemotherapy regimens: A preliminary report显示文摘 | Y.C. Zeng R. Wu Z.G. Xu X.Y. Zhang G.L. Fan L.N. Wu Y.M. Wang S.H. Hao W. Zheng X.D. Chen F. Chi Z.Y. Zhang X. Li X.Y. Jin W. Chen S.L. Wang F.D. Xiao E.Y. Wang X.Q. Dong L.B. Zhang M.X. Jia H.H.X. Xia H.B. Zhang Y. Li | 2009 | Cancer / Radiothérapie2009，，1： | 2 |
| 9 | Composite anode material of silicon/graphite/carbon nanotubes for Li-ion batteries显示文摘 | Y. Zhang X.G. Zhang H.L. Zhang Z.G. Zhao F. Li C. Liu H.M. Cheng | 2006 | Electrochimica Acta2006，，23： | 2 |
| 10 | Effects of Delayed Second Cochlear Implant显示文摘Objective Since Helms' successful bilateral cochlear implantation with good results in 1996, there have been increasing number of reports on bilateral cochlear implantation. Most second device have been implantated within one year after the first. Considering effects of long time auditory deprivation, it is not clear whether a delayed second cochlear implant serves to add additional benefits and how it may interact with central nervous system plasticity. Methods Three cases who received delayed second cochlear implants at People's Hospital of Peking University from 2002 to 2005 were reviewed. The interval between the first and second implants was longer than 2 years in all three patients. Sound perception, and unilateral/bilateral speech discrimination in quiet and noise were evaluated. In addition, GAP detection test was conducted in one patient. Results In one case, having both implants on provided improved performance compared to using only one implant both in quiet and noise. Presumably due to visual interference from lip-reading or short interval between second implant and testing, one patient showed no improvement from using the second implant either in quiet or noise, while the last case demonstrated additional benefits from the second implant only in quiet. In all three patients, performance in recognizing the four tones in Mandarin was superior over word recognition. Conclusions Considerable plasticity in the cerebral auditory center is preserved, despite long acoustic deprivation in some children who have received unilateral cochlear implant. Delayed second implants can result in significant improvements in some of these children. Visual interference from lip-reading may be an obstacle during retraining. The better recognition of tones in the Mandarin language may represent a different sound discrimination mechanism in the auditory system, although it may also be related to the signal processing mechanisms of the implant used (MED-EL COMBI 40+). | XIA Rui-ming1, WU Xi-hong2, JANG Zi-gang1, JING Yuan-yuan1, LIN Yun-juan1, YU Li-sheng1 1. Department of Otolaryngology, People’s Hospital, Peking University, P. R. China 11, Xizhimen South St, 100044 Beijing, P.R. China 2. Speech and Hearing Research Center, Peking University, China R.M. Xia, X.H. Wu, Z.G. Jang, Y.Y. Jing, Y.J. Lin, L.S.Yu | 2006 | Journal of Otology2006，1，2： | 2 |
| 11 | Heat transfer enhancement of high temperature thermal energy storage using metal foams and expanded graphite显示文摘 | C.Y. Zhao Z.G. Wu | 2010 | Solar Energy Materials and Solar Cells2010，，2： | 2 |
| 12 | Mercury pollution in Asia: A review of the contaminated sites显示文摘 | P. Li X.B. Feng G.L. Qiu L.H. Shang Z.G. Li | 2009 | Journal of Hazardous Materials2009，，2： | 1 |
| 13 | Densification of large-size spray-deposited Al–Mg alloy square preforms via a novel wedge pressing technology显示文摘 | Z.H. Chen C.H. Fan Z.G. Chen W. Li D. Chen | 2008 | Materials Science & Engineering A2008，，1： | 1 |
| 14 | Nano-scale GeO 2 wires synthesized by physical evaporation显示文摘 | Z.G. Bai D.P. Yu H.Z. Zhang Y. Ding Y.P. Wang X.Z. Gai Q.L. Hang G.C. Xiong S.Q. Feng | 1999 | Chemical Physics Letters1999，，3： | 1 |
| 15 | Effects of post-thermal treatment on preparation of surface microstructures induced by polarized laser on polyimide film显示文摘 | M. Li Q.H. Lu J. Yin Y. Qian Z.G. Wang | 2002 | Materials Chemistry and Physics2002，，3： | 1 |
| 16 | Parametrically excited instability analysis of a semi-actively controlled cable显示文摘 | Z.G. Ying Y.Q. Ni J.M. Ko | 2006 | Engineering Structures2006，，4： | 1 |
| 17 | High power diode laser cladding of Fe–Co–B–Si–C–Nb amorphous coating: Layered microstructure and properties显示文摘 | Y.Y. Zhu Z.G. Li R.F. Li M. Li K. Feng Y.X. Wu T. Wada H. Kato | 2013 | Surface & Coatings Technology2013，，： | 1 |
| 18 | Effect of pulsed laser irradiation on TbAlO 3 synthesis under atmospheric conditions显示文摘 | W.W. An J.P. Miao Z.G. Zhang | 2006 | Physica B: Physics of Condensed Matter2006，，1： | 1 |
| 19 | Effects of Current Stressing on Shear Properties of Sn-3.8Ag-0.7Cu Solder Joints显示文摘Effects of electromigration on microstructure, shear strength, and fracture behavior of solder joints were investigated by single-ball shear samples of eutectic Sn-3.8Ag-0.7Cu (SAC) joined by Cu plates at two sides. The electromigration tests were conducted at a current density of about 1.1×103 A/cm2 and a working temperature of about 83℃. The results showed that the shear strength and flow stress decreased greatly after current stressing. Such a decrease was associated with no significant loss of the fracture strain at short electromigration but a great reduction in the fracture strain after long-term current stressing. The variation of the fracture strain with the electromigration time was shown to result from the shift of the fracture surface from the center of the solder towards the intermetallic compound (IMC) interface at the cathode. | X.J. Wang Q.L. Zeng Q.S. Zhu Z.G. Wang J.K. Shang | 2010 | Journal of Materials Science & Technology2010，26，8： | 1 |
| 20 | Hypoglycemic activity of polysaccharide, with antioxidation, isolated from cultured Cordyceps mycelia显示文摘 | S.P. Li G.H. Zhang Q. Zeng Z.G. Huang Y.T. Wang T.T.X. Dong K.W.K. Tsim | 2005 | Phytomedicine2005，，6： | 1 |
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