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| 1 | Study on WC dispersion-strengthened copper显示文摘Dispersion-strengthened copper (DSC) with WC as dispersoid was prepared by means of mechanical alloying (MA) following the traditional powder metallurgy (P/M) route. Influence of WC content on the properties of material was discussed in detail, and result shows that when the volume fraction of WC is 1.6%, the material achieves the best overall property, and a little more particle addition led to a less superior property owing to occurrence of particle agglomeration The as-sintered composite was designed to undergo a deformation of 75%. It is proved that appropriate deformation is helpful to attain a higher density and consequently better properties. Deformed material was then exposed to elevated temperature to test its effect on material. Annealing for 1 h at 1173K caused material to recover quite completely, but no obvious recrystallization was observed. It's supposed the particles handicaps motion of dislocations and material demonstrates good retention of strength with substantial improvement in elongation. | WANGMengjun ZHANGLiyong LIUXinyu | 2004 | Rare Metals2004，23，2： | 5 |
| 2 | Room-temperature mechanical properties of WSi_2/MoSi_2 composites显示文摘Five Kinds of WSi2/MoSi2 composites were successfully prepared by mechanical alloying,IP and high temperature sintering techniques.And their hardness and fracture toughness were measured by the Vickers indentation fracture mode through an Hv-10A type sclerometer.The microstructure and morphology were investigated by a JSM-5600IV scanning electron microscope.Results show that the addition of 50% WSi2(in mole fraction)has remarkable hardening and toughening effects on the MoSi2 matrix.whose hardness value and fracture toughness value are increased about 60% and 86%,respectively.For WSi2/MoSi2 comosite,the hardening mechanisms are fine-grain and the second phase particles strengthening,and the toughening mechanisms include fine-grain,grain drawing,crack deflection,microbridge and bowing toughening. | ZHANGHouan LIUXinyu 等 | 2002 | Rare Metals2002，21，4： | 5 |
| 3 | A 5.3-GHz 32-bit accumulator designed for direct digital frequency synthesizer显示文摘A 32-bit pipeline accumulator with carry ripple topology is implemented for direct digital frequency synthesizer.To increase the throughout while hold down the area and power consumption,a method to reduce the number of the pre-skewing registers is proposed.The number is reduced to 29% of a conventional pipeline accumulator.The propagation delay versus bias current of the adder circuit with different size transistors is investigated.We analyze the delay by employing the open circuit time constant method.Compared to the simulation results,the maximum error is less than 8%.A method to optimum the design of the adder based on the propagation delay is discussed.The clock traces for the 32-bit adder are heavily loaded,as there are 40 registers being connected to them.Moreover,the differential clock traces,which are much longer than the critical length,should be treated as transmission lines.Thus a clock distribution method and a termination scheme are proposed to get high quality and low skew clock signals.A multiple-type termination scheme is proposed to match the transmission line impedance.The 32-bit accumulator was measured to work functionally at 5.3 GHz. | CHENJianWu WUDanYU ZHOULei WUJin JINZhi LIUXinYu | 2012 | Chinese Science Bulletin2012，57，19： | 3 |
| 4 | 显示文摘 | WangDezhi(王德志) LiuXinyu(刘心宇) ZhouMeiling(周美玲) | | 稀有金属材料与工程0，，： | 1 |
| 5 | Optical perform- ance of inclined south-north single-axis tracked solar pan-els显示文摘 | Li Zhimin LiuXinyue Tang Runsheng | 2010 | Energy2010，35，6： | 1 |
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