2-17. High throughput preparation and characterization of AgCuNi precious metal alloys

Xie Ming, Chen Yongtai, Yang Youcai, Fang Jiheng, Hu Jieqiong, Duan Yunzhao, Ma Hongwei, Zhao Shangqiang, Fan Xiaotong

Sino-platinum Metals Co.,Ltd, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Yunnan, 650106

Abstract: AgCuNi precious metal alloys have good conductivity of heat and electricity, good wettability, strength and plasticity, and corrosion resistance. Therefore, as the welding solders, they are widely used in aviation, aerospace, electronics, communications, electrical and other industries. There is a large market demand and high output value at home and abroad. In this paper, a new method of high-throughput fabrication with gradient distribution of alloy composition by directional solidification is introduced. The process of fabrication is to place the pre-designed AgCuNi alloys with different components into the induction melting crucible of vertical directional solidification furnace in turn, and then gradually flow into the mould of the crystallizer after melting, and finally pull out after solidification by the bottom crystallizer, AgCuNi ternary alloy bar or alloy plate with composition gradient change can be prepared; then, the chemical composition distribution of the alloy was characterized by OPA-100 in-situ metal analyzer and X-ray fluorescence analysis statistical system; the hardness distribution of the material was measured by continuous indentation high-flux hardness tester; and the conductivity of different parts of the material was measured by eddy current conductometer. The hardness and hardness change trend of interface of different phases in gradient structure were measured by nanoindentation instrument. The dynamic wetting angle of alloys with different compositions and the relationship between wetting angle and reaction interface energy and surface tension were measured by wetting angle measuring instrument.The results show that the high-throughput detection and rapid characterization of AgCuNi alloy can be realized by using this preparation technology, combined with the high-throughput characterization technology of alloy composition, structure and performance, which provides basic parameter data for further alloy screening, alloy database, data mining, machine learning and other research.

Keyword: AgCuNi alloy, directional solidification, gradient component, gradient texture performance, high-throughput experimentation

贵金属 AgCuNi 系合金的高通量制备与表征

谢明，陈永泰，杨有才，方继恒，胡洁琼，段云昭，马宏伟，赵上强，范小通 

贵研铂业股份有限公司，稀贵金属综合利用新技术国家重点实验室，云南昆明 650106

摘要:贵金属AgCuNi系合金具有良好的导电导热性、润湿性、强度和塑性，以及耐腐蚀等性能， 因此，作为焊接钎料，广泛应用于航空、航天、电子、通讯、电器等行业，国内外市场需求量 大、产值高。本论文介绍了采用定向凝固进行合金成分呈梯度分布的高通量制备新方法，其制 备过程是将预先设计好的不同成分的AgCuNi系合金，依次放入立式定向凝固炉的感应熔炼坩埚 中，待熔化后逐步流入结晶器的模具内，最后经底部结晶器凝固后拉出，可以制备出合金成分 呈梯度变化的AgCuNi系三元合金棒材或合金板材;再利用OPA-100型金属原位分析仪和X荧光 分析统计系统，对合金进行化学成分分布的高通量表征;利用连续压痕高通量硬度测试仪对材 料的硬度分布进行高通量测试;利用涡流电导仪对材料的不同部位的导电率进行高通量测试; 利用纳米压痕仪测试了梯度组织结构中各相界面的硬度及硬度变化趋势;利用润湿角测量仪测 试了不同成分的合金动态润湿角的变化规律，以及润湿角与反应界面能和表面张力大小的变化 关系等。研究结果说明，利用本项制备技术，再结合合金的成分、组织、性能的高通量表征技 术，可以实现AgCuNi系合金的高通量检测和快速表征，为进一步的合金材料筛选、合计材料数 据库、数据挖掘、机器学习等的研究提供了基础参数数据库。

关键词:AgCuNi 系合金;定向凝固;梯度成分;梯度组织性能;高通量实验