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, and their sintering behavior was chiefly investigated, including the crystal structure, saturation magnetization Ms, magnetic anisotropy field H a, intrinsic coercivity H ci, and Curie temperature T C. Experiment...Low temperature sintering behavior of La-Co substituted M-type strontium hexaferrites for use in microwave LTCC technology黄太星,彭龙,李乐中,王瑞,胡云,涂小强Sichuan Province Key Laboratory of Information Materials......
Temperature field numerical simulation ofinduction skull melting processCHEN Zi-yong(陈子勇), SHU Qun(舒 群), XU Li-juan(徐丽娟),TIAN Jing(田 竞), CHEN Yu-yong(陈玉勇)(School of Materials Science and Engineering,Harbin Institute of Technology, Harbin 150001, China)Abstract:A mathematical model for temperature field of water-cooling copper crucible in the induction skull melting process is established......
constant εr, Curie temperature TC, electromechanical coupling factor kp and piezoelectric constant d33 decrease, whereas the mechanical quality factor Qm and dielectric loss tanδ increase... of PMS. Pb(Mn1/3Sb2/3)O3 has a low Curie temperature. With increasing of Pb(Mn1/3Sb2/3)O3 addition, the Curie temperature of PMS–PZT ceramics becomes lower and consequently the peak of dielectric......
Tb-Dy-Fe-Co合金本征磁致伸缩性能崔跃1,蒋成保1,徐惠彬1(1.北京市北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室)摘 要:研究了Tb0.36Dy0.64(Fe0.85Co0.15)1.95合金中替换元素Co的分布及其对材料内禀磁性和本征磁致伸缩性能的影响.EDS分析表明,合金中产生了Co富集的富稀土相,Co在其中的含量为21.18%(原子分数),高于基体中Co的含量9.36%.Co元素部分替换Fe未改变巨磁致伸缩合金主相Laves相的结构,合金的Curie温度从378℃提高到420℃,拓展了应用温度范围;同时,Co元素的添加部分补偿了由于Tb/Dy比例提高所增大的磁晶各向异性,有利于改善合金低场性能.为避免样品的生长取向对本征磁致伸缩性能测量的影响,保证测量结果的准确性,制......
Temperature field simulation of gob influenced by atmospheric pressureWANG Gang(王刚)1,2, LUO Hai-zhu(罗海珠)2, LIANG Yun-tao(梁运涛)2, WANG Ji-ren(王继仁)1(1. College of Safety Science and Technology, Liaoning...)Abstract:The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressureinto account, while the actual atmospheric pressure is influenced by weather, so......
Size effect of sandstone after high temperature under uniaxial compressionSU Hai-jian(苏海健)1, JING Hong-wen(靖洪文)1, MAO Xian-biao(茅献彪)1, ZHAO Hong-hui(赵洪辉)1, YIN Qian(尹乾)1, WANG Chen(王辰)2(1. State Key... of Mining & Technology, Beijing 100083, China)Abstract:Uniaxial compression tests on sandstone samples with five different sizes after high temperature processes were performed in order to investigate......
Temperature gradients in concrete box girder bridge under effect of cold waveGU Bin(顾斌)1, CHEN Zhi-jian(陈志坚)2, CHEN Xin-di(陈欣迪)3(1. College of Civil and Transportation Engineering, Hohai University..., China)Abstract:The temperature distributions of a prestressed concrete box girder bridge under the effect of cold wave processes were analyzed. The distributions were found different from those under......
Microstructure Development of Directionally Solidified Nb-Ti-Si Based Ultrahigh Temperature Alloy () 摘要:Integrally directional solidification of an Nb-Ti-Si based ultrahigh temperature alloy was performed in an ultrahigh temperature and high thermal gradient furnace with the use of ceramic crucibles. The microstructural evolution with the withdrawing rate increasing during directional......
Research on Mediate Temperature Decomposition of High Nitrogen Austenite HU Ming-juan1,LI Xiao-ling1,BEI Duo-hui1,ZHU Zu-chang1 (1.School of Material Science and Engineering, Shanghai Jiao Tong... are composed of highly dispersed α-Fe and γ-Fe4N, with both of them maintaining nanometer scale. The micro-hardness of them can be as high as900HV. 关键词:high nitrogen austenite; mediate temperature......
.%, and 0.8 wt.%, but had a similar value as compared with the undoped samples. When the Cr2O3 additive increased, the Curie temperature moved toward low temperature and the changes of resonant frequency...Effects of Cr2O3 doping on the electrical properties and the temperature stabilities of PZT binary piezoelectric ceramicsLI Jianhua a and SUN Qingchi b a School of Electronic and Information......
