Electrochemical properties of cobalt-free La0.80Mg0.20Ni2.85Al0.11M0.53 （M=Ni, Si, Cr, Cu, Fe） alloys

In order to investigate the effect of different B-site additions on phase structure and electrochemical properties of cobalt-free La-Mg-Ni based alloys, La0.80Mg0.20Ni2.85Al0.11M0.53 (M=Ni, Si, Cr, Cu, Fe) hydrogen storage alloys were prepared and studied systemati-cally. X-ray powder diffraction showed that the alloys consisted mainly of LaNi3 phase and LaNi5 phase except that Cr addition caused a minor Cr phase. Electrochemical testing indicated that alloys with additional Ni, Cr, Cu or Fe were activated within only 1-2 cycles, while that with Si addition needed 4 cycles. Adding Si, Cu and Fe increased cycling stability of La-Mg-Ni based alloys. However, maximum discharge capacity decreased from 362 mAh/g to 215 mAh/g in the order of Ni>Fe>Cu>Cr>Si. In addition, electrochemical kinetics of alloy electrodes was also researched by measuring high rate discharge ability (HRD), hydrogen diffusion coefficient (D) and limiting current density (IL).     

稀土变质处理改善耐磨铸铁的组织与韧性

研究了稀土变质处理对耐磨铸铁显微组织及冲击韧性的影响.结果表明,稀土变质能使铸铁的网状碳化物断开,冲击韧性提高,尤其变质后再经热处理,效果更明显.     

M型六角钡铁氧体的制备与XRD分析

选用化学共沉淀法制备M型钡铁氧体，并利用热分析和XRD等方法对其晶体结构进行分析。     

对检察机关作为环境民事公益诉讼中的原告资格的探析

环境民事公益诉讼是指:针对侵害社会公共的环境利益的民事行为提起的诉讼。环境民事公益诉讼原告资格的确定关系到社会公共的环境利益能否得到充分的司法救济。确定检察机关在环境民事公益诉讼的原告主体资格,使民事行为侵害社会公共的环境利益时,检察机关能够依法进行监督,提起民事性的环境公益诉讼,这符合依法治国的内在要求:检察机关作为环境民事公益诉讼的适格原告与其作为我国法律的监督机关并不矛盾,符合宪法的精神;也不会引起环境民事诉讼结构的不平衡;检察机关也是保护社会公共的环境利益的适合的主体。     

聚合物淬火介质SST301对斜轧半钢磨球硬度及开裂性的影响

研究了斜轧半钢磨球在淬火介质SST301中淬火后的硬度，淬裂敏感性，结果表明：适合斜轧半钢磨球淬火介质SST301的浓度应在1．0％－1．5％之间，且温度低于40℃。     

稀土元素对低合金耐磨铸铁耐磨性的影响

从改变共晶碳化物形貌的角度研究了稀土元素对低合金耐磨铸铁耐磨性的影响。结果表明,稀土元 素能改善共晶碳化物的形状,提高其耐磨性,尤其稀土变质后再经950℃×3h正火处理后效果更显著。     

M型钡铁氧体的制备与表征

利用化学共沉淀法制备M型六角钡铁氧体 ,采用XRD、TEM等测试方法对其晶体结构、形貌进行观察 ,并利用振动样品磁强计进行磁性能测量。     

Phase Structure and Electrochemical Characteristics of Ml（Ni3.55Co0.75Mn0.40Al0.30）5x （x=0.88, 0.92, 0.96, 1.00） Hydrogen Storage Alloys

The phase structure and electrochemical characteristics of Ml （（Ni3.55Co0.75Mn0.40Al0.30）sx （ x = 0.88, 0.92, 0.96, 1.00） hydrogen storage alloys were studied. The effect of the stoichiometric ratio on the phase structure and electrochemical characteristics was analyzed. The results of XRD reveal that all the alloys consist mainly of LaNi5 phase with the hexagonal CaCu5 structure. But a few of the diffraction peaks of La2Ni7 phase on XRD pattern are observed when x ≤ 0.92, and with decreasing x, the intensity of La2Ni7 diffraction peaks increases and the values of lattice parameters a and cell volume increase, c and c/a of LaNi5 phase decrease gradually. When x≥0.96, La2Ni7 phase disappears and the alloys become single CaCu5-type. The electrochemical tests show that the maximum discharge capacity, high rate dischargeability and low temperature dischargeability are improved to different degrees by adjusting the stoichiometric ratio.     

聚合物淬火剂的冷却机制及在热处理中的应用

对淬火剂SST101在其不同浓度下冷却曲线及40CrMn钢在该介质中淬火后的淬透性，变形开裂性及力学性能进行了测定，并探讨了其冷却机制，所得结果对淬火剂SST101的应用，具有重要的指导意义。     

聚合物淬火介质SST102在轴承钢热处理中的应用

研究了轴承钢GCr15在淬火介质SST102中淬火后的淬透性,变形开裂性。结果表明,适当调整SST102的浓度,可获得不同的冷却速度,适合轴承钢GCr15淬火介质的最佳浓度为1.5%～2.0%。