基于低温制冷机的铝合金RRR值测试  

Measurement of RRR for aluminum alloy based on cryocooler

作　　者：尹成厚 刘东立[1,2] 甘智华[1,2] 金泽远 王邦旭 

机构地区：[1]浙江大学制冷与低温研究所,杭州310027 [2]浙江省制冷与低温技术重点实验室,杭州310027 [3]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《低温工程》2015年第4期27-32,共6页Cryogenics

基　　金：国家磁约束聚变科学计划(2015GB121001);西门子(深圳)磁共振有限公司资助

摘　　要：介绍了目前测量合金材料剩余电阻率比RRR(Residual resistivity ratio)值的3种主要方法,比较了各自的优点和不足,进而提出了基于低温制冷机的测试方法,经过理论分析和实验验证可知,该方法不仅可以得到材料的RRR值,还可以得到材料在各个温度下的电阻值,并拥有目前3种主要方法所不具备的优势。最后把低温制冷机测得的结果与PPMS的测量结果进行对比分析,从而论证了基于低温制冷机平台测量方法的合理性和测量结果的准确性。Three main methods of measuring alloy RRR（residual resistivity ratio）at present were intro- duced, the respective advantages and disadvantages were compared. Then the new test method based on the cryocooler was proposed. Through theoretical analysis and experimental verification, it is known that not on- ly the RRR value of the material, but also material resistance values at various temperatures can get by this method which has the unique advantages compared from the current three main methods. Finally, the meas- ured results of cryocooler and those from PPMS were compared, which demonstrated the accuracy of the measurement results and the rationality of the test method based on cryocooler.

关 键 词：低温制冷机 剩余电阻率 铝合金PPMS系统 四线法 

分 类 号：TB663[一般工业技术—制冷工程]