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Preparation of La0.9RE0.1MnO3 Ultra-fine Particles Used for CH4 Oxidation 刘全生1,郑海涛1,张通1,刘源1 (1.Department of Chemical Engineering, Inner Mongolia Polytechnic University, Huhehot 010062, China) Abstract:A technique for preparing perovskite-type oxides was developed. By this technique, ultra-fine particles of La0.9RE0.1MnO3 (RE: Y, Ce, Pr, Sm, Gd,or Dy) with high surface area and single......
Toughening mechanisms of a high-strength acicular ferrite steel heavy plateZhi-qiang Cao1,2), Yan-ping Bao1), Zheng-hai Xia2), Deng Luo3), Ai-min Guo3), and Kai-ming Wu3) 1) Engineering Research... Laboratory for Systems Science on Metallurgical Processing, Wuhan University of Science and Technology, Wuhan 430081, China摘 要:An ultra-low carbon acicular ferrite......
Synthesis and Characterization of Gadolinium Doping M-type Hexagonal Barium Ferrite Ultrafine Powders 郭睿倩1,顾明元1,陈亚杰3,梁乐1,孙培梅4,金燕萍1,李洪桂4 (1.State Key Laboratory of MMCs, Shanghai Jiaotong University... reaches 430 kA*m-1 at x=1.0, which is far greater than that of barium ferrite (BaFe12O19). Key words:materials science; sol-gel method; permanent ferrite; citrate; ultrafine powders; rare earths; [全文内容正......
Ultra-fine ferrite grains obtained in the TSDR processLing Zhang1),Wangyue Yang1),Chunxia Xue2),and Zuqing Sun2) 1) School of Materials Science and Engineering,University of Science and Technology...">By careful design of rolling schedule,ultra-fine (~2μm) ferrite grains in a low carbon high niobium (0.09wt%Nb) micro-alloying steel with average austenite grain sizes above 800 μm can be achieved......
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含Ti复合第二相粒子对微合金钢焊接热影响区组织和性能的影响舒玮1,王学敏1,李书瑞2,贺信莱1(1.北京市北京科技大学材料科学与工程学院2.武汉钢铁(集团)公司)摘 要:系统分析了含Ti的复合第二相粒子对微合金钢模拟焊接热影响区(WHAZ)组织和性能的影响.研究发现,即使在较长的相变冷却时间t8/5=120 s下(对应焊接线能量为100 kJ/cm),Ti脱氧实验钢的模拟WHAZ低温冲击韧性也明显好于Al脱氧对比钢.含Ti的第二相粒子对WHAZ性能的改善作用主要表现在以下两个方面:首先,钢中弥散分布着大量尺寸在......
cementite particles, was manufactured by a new approach utilizing simple cold-rolling and subsequent annealing of a dual phase ferrite-martensite starting structure. The mean ferrite grain size and carbide size range of the specimen after 80% cold-rolling and subsequent annealing at 600 °C for 20 min were 0.35 lm and 70–140 nm, respectively. A combination of bimodal ultrafine ferrite and nanoscale......
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processing route display smaller particles with more even size distribution, the average size of around 15 nm. Key words: zirconia; emulsion; spherical nanometer particles 1 Introduction Zirconia... temperature, high packing density, and uniform microstructure. Nano-particles (less than 0.1 μm) can further enhance sinter ability at lower temperatures with smaller residual pores and grain sizes......
Orientation Relationships between Ferrite and Cementite by Edge-to-edge Matching PrincipleNing Zhong1), Xiaodong Wang2), Zhenghong Guo2) and Yonghua Rong2) 1) Institute of Marine Materials Science..." name="ChDivSummary">The crystallographic features of pearlite were investigated by experiments and edge-to-edge matching principle. Two new orientation relationships between ferrite and cementite were......