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steel (n=300 r/min, r=1.5 mm) 4 Conclusions 1) LMI layer can be achieved only under the condition that process parameters meet the strict requirements. The optimized processing... surface alloyed coating on the substrate of TiAl intermetallics [J]. Journal of Alloy and Compounds, 2003, 351: 304-308. [4] WU X L, CHEN G N. Microstructure characterization and evolution of laser......
is over 181.4 mA?h/g, and the capacity retain rate is 96.8 % after 30 cycles. Fig.9 Capacity vs cycle number for LiNi0.8Co0.2O2 sample synthesized at 720 ℃ for 12 h 4 Conclusions 1... on performance and structure of spinel LiMn2O4 for lithium-ion batteries by doping rare-earth Sm[J]. Journal of Central South University of Technology, 2005, 12(1): 28-32. [4] WANG Miao-jun, NAVROTSKY......
2.1.3 分散设备 为了将超声分散,机械搅拌分散和颗粒表面修饰三者相结合,自行设计研制出1台超声分散装置,其三维示意图如图3所示.根据相关研究,超声波在低频时易于产生空化作用,高频时易于产生共振作 用[15],因此,本装置中采用低频高功率超声波(频率为20 kHz,功率为200 W). 1-往复机构；2-超声波发生器；3-料斗；4-旋转机构...钨颗粒与基础油按质量比1?99装入料斗,开启装置,处理一定时间后即可得到均匀分散的纳米二硫化钨润滑油. 2.3 分散效果的表征与分析 为了评价纳米二硫化钨颗粒在润滑油中的分散效果,采用沉降法,粒度分布法和显微镜法进行表 征.稳定时间为经离心沉降后液面出现明显分层的时间,平均粒度为激光衍射粒度. 表面修饰剂用量对颗粒分散稳定性的影响如图4 表1......
(OC4H9)4) was analytically pure. 2.2 Preparation of composite polymer electrolyte films PEO and LiClO4 were dissolved in acetonitrile and the mixture was stirred at room temperature for 3 h to obtain... 4.7×10-6 S/cm and 1.5×10-4 S/cm at 20 ℃ and 80 ℃, respectively. 4 Conclusions 1) Nanocomposite polymer electrolytes based on PEO-LiClO4 system are synthesized, in which the ceramic filler, TiO2......
]. The metastableTi-1023 alloy may be forged at relatively low temperatures and heat treated to achieve strengths as high as 1 200-1 400 MPa, with elongation in the range 4%-10%. While the microstructure-property... during deformation[9,10]. Detailed microstructural examination is required to decide them. 4) Ti-1023 alloy has lower flow stress than any other titanium alloy, and so it is more suitable......
, including both small (about 20 nm) and relatively large (about 0.1 μm) particles, restrain the migration of high angle boundaries as shown in Fig.7. 4 Discussion 4.1 Effect of second phase particles.... [3] Tarasiuk J, Gerber P, Bacroix B. Estimation of recrystallised volume fraction from EBSD data[J]. Acta Materialia, 2002, 50: 1467-1477. [4] Wilson A W, Madison J D, Spanos G. Determining phase......
将预处理过的炭纤维基体放在硝酸镍的乙醇溶液中浸渍4 h,然后暴露在空气中让乙醇自然挥发.将浸渍后的炭纤维基体放入管式炉的恒温区,在N2(流量为120 mL/min)气流中加热到450 ℃,保温1.5 h使硝酸镍分解,然后调节温度到400~800 ℃,引入H2(流量为140 mL/min)还原10~90 min,反应结束后在N2气氛中冷却到室温.用扫描电镜对实验产物进行观察和分析. 2... carbon nanotubes with two pentagon-heptagon pairs defects[J]. Journal of Central South University of Technology: Natural Science, 2003, 34(5): 510-512. [4] 李燕峰, 徐 慧, 马松山, 等. 单壁碳管直径对电子结构的影响[J]. 中南大学学报: 自然科......
is maintained, even though the composites suffer severe compression and rolling deformation. 4 Discussion 4.1 Hardness variation on transverse section parallel to applied force direction Hardness.... [3] MAMALIS A G, SZALAY A, VAXEVANIDIS N M, MANOLAKOS D E. Fabrication of bimetallic rods by explosive cladding and warm extrusion [J]. J Mater Process Technol, 1998, 83(1/3): 48-53. [4] HWANG Y M......
to discover that our simple framework is capable of incorporating several recently proposed mechanisms of drag reduction by polymer additives, which has been discussed in our recent papers[23-24]. 4...] VIRK P S. Drag reduction fundamentals [J]. AIChE Journal, 1975, 21: 625-656. [4] GRAHAM M D. Drag reduction in turbulent flow of polymer solutions[C]// Binding D M, Walters K eds. Rheology Reviews......
as function of cycle number for cells shown in Fig.4 4 Conclusions 1) The particle size distribution of Li4Ti5O12 is more dependent on that of Ti sources than on that of Li sources. 2) Ethanolamine..., 2006, 153(3): 560-565. [4] TORU T, HIDEO Y, MASANORI Y. Mechanism of Li-doping into Li4Ti5O12 negative active material for Li-ion cells by new chemical method[J]. Journal of Power Sources, 2006......
