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Effects of hot rolling on microstructure and properties of a 20 vol.% SiC_P/Al composite 认领 引用 被引量：2
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作者 QUShoujiang GENGLin MENGQingchang FENGAihan LEITingquan 《Rare Metals》 SCIE EI CAS 2005年第1期95-99,共5页
A 20 vol. percent SiC_p/Al composite was fabricated by squeeze casting, ofwhich a new process for fabricating the preform was used by blending Al powder and SiC particulateswith average diameters of 10 and 3.5 mu m, r... A 20 vol. percent SiC_p/Al composite was fabricated by squeeze casting, ofwhich a new process for fabricating the preform was used by blending Al powder and SiC particulateswith average diameters of 10 and 3.5 mu m, respectively. The microstructure of the as-cast and thehot-rolled composite was investigated by using TEM, EDS, and SEM, and their tensile properties weremeasured at room temperature. The results show that the ultimate tensile strength and ultimateelongation of the hot-rolled composite are 80 percent and 140 percent higher than those of theas-cast one. The TEM observation result indicates that there are high density of dislocations anddislocation tangles in the hot-rolled composite. Al_2O_3 layers in the composite resulting from thesurface oxidation of the aluminum powders were damaged to spherical particles during hot rolling.All the results indicate that hot-rolling can improve the mechanical properties of the compositeand, therefore, engineering components of the 20 vol. percent SiC_p/Al composite can be produced bysqueeze casting followed by hot-rolling. 展开更多
关键词 composite hot rolling squeeze casting silicon carbide particulate
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A Design of ABC95 Array Computer Multi-function Interconnection Chips 认领 引用
2
作者 季振洲 ZhangHongtao 《High Technology Letters》 EI CAS 2002年第1期12-16,共5页
ABC95 array computer is a multi-function network computer based on FPGA technology. A notable feature of ABC95 array computer is the support of complex interconnection, which determines that the computer must have eno... ABC95 array computer is a multi-function network computer based on FPGA technology. A notable feature of ABC95 array computer is the support of complex interconnection, which determines that the computer must have enough I/O band and flexible communications between Pes. The authors designed the interconnecting network chips of ABC95 and realized a form of multi-function interconnection. The multi-function interconnecting network supports conflict-free access from processors to memory matrix and the MESH network of enhanced processors to processor communications. The design scheme has been proved feasible by experiment. 展开更多
关键词 SIMD Array computer Conflict-free Access
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Experimental observation and computer simulation on non-equilibrium grain-boundary segregation kinetics of phosphorus 认领 引用
3
作者 LILi LIQing-fen LIUEr-bao 《Journal of Marine Science and Application》 2005年第1期60-64,共5页
An experimental study and computer simulation on non-equilibriumgrain-boundary segregation kinetics and the critical time for phosphorus in 12CrlMoV steel (which isused in steam pipeline of ships) are put forward in t... An experimental study and computer simulation on non-equilibriumgrain-boundary segregation kinetics and the critical time for phosphorus in 12CrlMoV steel (which isused in steam pipeline of ships) are put forward in this paper. The segregation level ofphosphorus with solution temperature 1 050 ℃ at the isothermal holding temperature of 5401 , havebeen measured at grain-boundaries. A non-equilibrium grain-boundary segregation kinetics curve ofphosphorus is given. The critical time for phosphorus non-equilibrium grain-boundary segregation isabout 500h at 540 ℃ for the experimental steel. When the holding time is longer than 1 500 h ,non-equilibrium segregation disappears and the level of segregation reaches full equilibrium. Thesimulation using the kinetic equations of non-equilibrium grain-boundary segregation is in goodaccordance with the experimental observation for phosphorus in steel 12Crl MoV. The non-equilibriumgrain-boundary segregation kinetic model is therefore proved. 展开更多
关键词 steels grain boundaries segregation computer simulation
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