| 预热速率和Mg粒度对MgCNi_3致密度及相成份的影响 |
| |
| 引用本文： | 冯旺军,何祖明,夏咏梅,张爽,郭永庆,杨华.预热速率和Mg粒度对MgCNi_3致密度及相成份的影响[J].低温物理学报,2010(3). |
| |
| 作者姓名： | 冯旺军 何祖明 夏咏梅 张爽 郭永庆 杨华 |
| |
| 作者单位： | 甘肃省有色金属新材料省部共建国家重点实验室;兰州理工大学理学院; |
| |
| 基金项目： | 甘肃省自然科学基金(项目编号:2007GS05336); 甘肃省教育厅项目(项目编号:0803-03)资助的课题~~ |
| |
| 摘 要： | 用自蔓延高温合成法(SHS)制备了MgCNi_3超导块材,用XRD和SEM对试样进行了表征,理论计算和实验结果表明,如果预热温度太低,自蔓延过程不能进行,当预热温度大于620℃时才能用电弧引燃反应,预热速率越小试样越致密;Mg粒度越小反应后绝热温度越高,成相速率越快,并导致合成产物出现烧结现象,样品所形成的致密度和孔洞尺寸依赖于原始Mg粉的粒度,Mg粒度越小,试样越致密,孔洞越小,但是Mg粒度不同不改变晶粒的形成和生长机理.
|
| 关 键 词： | SHS法 MgCNi_3超导块材 预热温度 预热速率 Mg粒度 |
EFFECT OF THE PREHEATING RATE AND SIZE OF MG POWDER ON THE RELATIVE DENSITY AND PHASE COMPOSITIONS OF MGCNI_3 |
| |
| FENG Wang-jun HE Zu-ming XIA Yong-mei ZhANG Shuang GUO Yong-qing State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,Lanzhou Schoot of science,Lanzhou.EFFECT OF THE PREHEATING RATE AND SIZE OF MG POWDER ON THE RELATIVE DENSITY AND PHASE COMPOSITIONS OF MGCNI_3[J].Chinese Journal of Low Temperature Physics,2010(3). |
| |
| Authors: | FENG Wang-jun HE Zu-ming XIA Yong-mei ZhANG Shuang GUO Yong-qing State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials Lanzhou University of Technology Lanzhou Schoot of science Lanzhou |
| |
| Institution: | FENG Wang-jun~(1,2) HE Zu-ming~2 XIA Yong-mei~2 ZhANG Shuang~2 GUO Yong-qing~2 1 State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,Lanzhou 730050 ~2 Schoot of science,Lanzhou 730050 |
| |
| Abstract: | |
| |
| Keywords: | SHS method MgCNi_3 superconductor Preheating temperature Preheating rate Particle size of Mg powder |
| 本文献已被 CNKI 等数据库收录！ |
|
