作者机构：
[Chen Zhao-yong; Zhu Hua-li] Department of Materials Science and Engineering,Changsha University of Science and Technology,Changsha,410076;[Chen Zhao-yong; Shan Ji; Sivakumar Pasupathi; Ben Bladergroen; Vladimir Linkov] SAIAMC,University of the Western Cape,Bellville 7535,South Africa
会议名称：
第十四届国际锂电池会议(The 14th International meeting on lithium Batteries)(IMLB2008)
会议时间：
2008-6-22
会议地点：
天津
会议主办单位：
中国电子学会;中国化学与物理电源行业协会
会议论文集名称：
第十四届国际锂电池会议(The 14th International meeting on lithium Batteries)(IMLB2008)论文集
摘要：
The microstructures, mechanical properties and abrasive wear behaviour of five kinds of Si‐Mn‐Cr‐B cast steels were studied. The steels investigated contained X wt.% C with X= 0.15, 0.25, 0.35, 0.45, 0.55, 2.5 wt.% Si, 2.5 wt.% Mn, 0.5 wt.% Cr, 0.004 wt.%B . The results showed that the Ac1temperatures increased and Ac3 and Ms temperatures decreased with increasing carbon concentration. From the continuous cooling transformation (CCT) curves, it was discovered that the incubation period of pearlitic transformation was prolonged and the transformation curves of pearlite and bainite were separated significantly with rising carbon concentration. At lower carbon concentration, the normalized structure of Si‐Mn‐Cr‐B cast steel consisted mainly of granular bainite and M‐A islands. The normalized microstructures of the cast steel changed from granular bainite gradually to needle‐like bainite, upper bainite, and lower bainite with rising carbon concentration. The tensile strength and hardness of Si‐Mn‐Cr‐B cast steel increased and impact and fracture toughness decreased with increasing carbon content. The wear testing results showed that the wear resistance of Si‐Mn‐Cr‐B cast steel improved with higher carbon content but was obviously unchanged beyond the carbon concentration of 0.45%. The best balance of properties of Si‐Mn‐Cr‐B cast steel is obtained at the carbon concentration range of 0.35 ‐ 0.45%C.
期刊：
Materialwissenschaft und Werkstofftechnik,2008年39(8):557-561 ISSN：0933-5137
通讯作者：
Xue, Z.
作者机构：
[Xue, Z.] N China Elect Power Univ, Sch Energy & Power Engn, State Educ Minist, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China.;[Kuang, J.] Changsha Univ Sci & Technol, Dept Mat Sci & Engn, Changsha 410076, Hunan, Peoples R China.;[Fu, H.] Tsinghua Univ, State Educ Minist, Key Lab Adv Mfg Mat Proc Technol, Beijing 100084, Peoples R China.;[Xue, Z.] N China Elect Power Univ, Sch Energy & Power Engn, State Educ Minist, Key Lab Condit Monitoring & Control Power Plant E, 2 Beinong Rd, Beijing 102206, Peoples R China.
通讯机构：
[Xue, Z.] N;N China Elect Power Univ, Sch Energy & Power Engn, State Educ Minist, Key Lab Condit Monitoring & Control Power Plant E, 2 Beinong Rd, Beijing 102206, Peoples R China.
关键词：
metal matrix composites;TiB2;Fe2B;in-situ reaction;mechanical property;wear resistance
期刊：
South African Journal of Chemistry,2008年61(1):157-161 ISSN：0379-4350
通讯作者：
Ji, Shan
作者机构：
[Zhu, Huali; Chen, Zhaoyong] Changsha Univ Sci & Technol, Dept Mat Sci & Engn, Changsha 410076, Peoples R China.;[Ji, Shan; Linkov, Vladimir; Bladergroen, Ben; Pasupathi, Sivakumar] Univ Western Cape, S African Inst Adv Mat Chem, ZA-7535 Bellville, South Africa.
通讯机构：
[Ji, Shan] U;Univ Western Cape, S African Inst Adv Mat Chem, ZA-7535 Bellville, South Africa.
关键词：
LiNi0.5Mn1.5O4
摘要：
LiNi0.5Mn1.5O4 compounds were prepared through a solid-state reaction using various Ni precursors. The effect of the precursorson the electrochemical performance of LiNi0.5Mn1.5O4 was investigated. LiNi0.5Mn1.5O4 made from Ni(NO3)2•6H2O shows the bestcharge-discharge performance. The reversible capacity of LiNi0.5Mn1.5O4 is about 145mAh g–1 and remained at 143mAh g–1 after10 cycles at 3.0 to 5.0 V. The XRD results showed that the precursors and dispersion method had significant effects on theirstructures. Pure spinel phase can be obtained with a high energy ball-milling method and Ni(NO3)2•6H2O as precursor. A traceamount of the NiO phase was detected in LiNi0.5Mn1.5O4 with the manual grinding method when Ni(CH3COO)2•6H2O, NiO andNi2O3 were used as precursors.Keywords:LiNi0.5Mn1.5O4
摘要：
The effect of alkali earth metal oxides MO (M=Mg, Ca, Ba) on the crystallizing behavior and the microstructure of B<inf>2</inf>O <inf>3</inf>-Al<inf>2</inf>O<inf>3</inf>-SiO<inf>2</inf> system (BAS) were studied. DSC, XRD and SEM were used to analyze the crystallization kinetics and to characterize the crystal phases and microstructures of the glass-ceramics. MO can effectively facilitate the formation of BAS glass, and the crystallinity of the glass increases in the order of MgO <BaO <CaO. For one given MO, the crystallinity of the glass is dependent on B<inf>2</inf>O <inf>3</inf>/SiO<inf>2</inf> ratio: the lower the ratio is, the weaker the crystallinity of the glass will be. It was found that the early crystallization is aluminum metaborate (Al<inf>4</inf>B<inf>2</inf>O<inf>9</inf>) when the glass is heated at 800°C, and it would transfer into aluminum borate(Al <inf>18</inf>B<inf>4</inf>O<inf>33</inf>) at temperatures over 1000°C The activation energy and the Avrami exponent Of Al<inf>4</inf>B<inf>2</inf>O <inf>9</inf> were calculated by Ozawa formulation.
作者机构：
[黄扬风; 肖汉宁] College of Materials Science and Engineering, Hunan University, Changsha 410082, China;[陈曙光; 肖汉宁] College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China
通讯机构：
College of Materials Science and Engineering, Hunan University, China
作者机构：
School of Energy and Thermal Power Engineering, Changsha University of Science and Technology, Chang;School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha
会议名称：
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
会议时间：
2007-12-01
会议地点：
武汉
会议论文集名称：
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)论文集
关键词：
weak reduction and air atmospheres;corundum based refractory;slagging;SEM
摘要：
In this paper, ash of Yungui coal was selected for its low deformation temperature (DT is about 1120℃). Two samples of 0.6g the ash of Yungui coal were put on the corundum based refractories first, then they were laid in a muffle furnace for sintering experiments, which were made at 1250℃ for 5 hours under air atmosphere and weak reduction atmospheres respectively. After the experiments, the samples were cooled down naturally to room temperature, then a scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS) was carried out for investigating the microscopic structure of the slagging sintered on the corundum based refrectory board under weak reduction and air atmospheres. Accordingly, the following conclusions can be made from the analysis: (1) at 1250℃, the slagging sintered on the corundum based refractory under weak reduction atmosphere was quite tight, while the slagging sintered under air atmosphere was rather loose and no evident penetration into the refractory was observed; (2) atmospheres in the muffle furnace had a great effect on the slagging of melted coal ash on the refractories through changing the transformation forms of the mineral components (such as Fe) in coal ash; (3) the corundum based refractory implies a good slagging resistance effect by avoiding reasonably the forming of weak reduction atmosphere in furnaces during boilers operation.
摘要：
The effect of minor scandium addition on the microstructures and mechanical properties of Al-Zn-Mg-Cu-Zr alloys has been studied. Three alloys were produced by casting and then extruded to rods. Tensile properties of these alloys in different condition were tested. The relationship between mechanical properties and microstructures of the alloys was discussed in detial. The results showed that the tensile strength of Al-9.0Zn-2.5Mg-1.2Cu-0.15Zr-0.12Sc and Al-9.0Zn-2.5Mg-1.2Cu- 0.15Zr-0.20Sc in solution and T6 reaches 763.7MPa and 774.6MPa, respectively, while the elongation remains 5.7% and 8.3%, respectively.
作者机构：
[叶昌; 匡加才; 谭宇] College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China;[陈彦菲; 陈冬林] College of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410076, China
通讯机构：
College of Materials Science and Engineering, Changsha University of Science and Technology, China
作者机构：
[戴晓元] School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China;[戴晓元; 夏长清; 马科; 刘娟] School of Materials Science and Engineering, Central South University, Changsha 410083, China
通讯机构：
School of Materials Science and Engineering, Changsha University of Science and Technology, China
作者机构：
[龙春光; 彭小敏; 戴晓元; 夏长清] School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China;School of Materials Science and Engineering, Central South University, Changsha 410083, China
通讯机构：
School of Materials Science and Engineering, Changsha University of Science and Technology, China
