Study on the Microstructure and Properties of Pt-Co-Mn Alloy
LUO Yuan, WANG Xian, ZHAO Jun, HU Changyi, ZHANG Dawei, WEI Yan*, ZHANG Xuxiang, CAI Hongzhong*
State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China
Abstract: Four kinds of Pt-Co-Mn alloys were prepared by vacuum arc smelting. The microstructure, mechanical properties, magnetism, reflectivity and corrosion resistance of Pt-Co-Mn alloys were studied by X-ray diffractometer (XRD), metallographic microscope, microhardness tester, magnetism measuring instrument, spectrophotometer and electrochemical workstation. The results showed that the Pt-Co-Mn alloys were single phase solid solution with an average grain size of 200—300 μm. Co and Mn in solid solution were found to give a considerably higher strengthening effect than Co. The Vickers hardness of Pt-Co-Mn alloys varied from 162HV to 179HV, which was higher than that of Pt-5Co alloy. The magnetism of Pt-Co-Mn alloys could be eliminated by adding Mn to Pt-Co alloy at room temperature. In addition, Pt-2.0Co-2.0Mn alloy exhibited the lowest average susceptibility value of 1.45×10-5 and the smoothest hysteresis loop, which showed the best degaussing effect. The average reflectance of Pt-Co-Mn alloy in the visible spectrum ranged from 54.5% to 57.8%, which indicated that the proportion of Co and Mn elements had little influence on the reflectance of the alloy. The proportion of Co and Mn had little influence on the reflectance of the alloy. The analyzed alloys exhibited a good corrosion resistance in artificial sweat. Furthermore, Pt-2.6Co-1.4Mn alloy had higher corrosion potential value of -0.032 V and lower corrosion current density value of 2.01 μA/cm2. The obtained corrosion potential and corrosion current density led to the best corrosion resistance of Pt-2.6Co-1.4Mn alloy.
通讯作者:
*魏燕,昆明贵金属研究所教授级高级工程师、硕士研究生导师。2005年同济大学材料科学与工程专业本科毕业,2008年昆明贵金属研究所材料学专业硕士毕业后到昆明贵金属研究所研发中心工作至今,2018年昆明理工大学材料学专业博士毕业。目前主要从事稀贵金属耐高温抗氧化新材料等方面的研究工作,发表论文30余篇,参与撰写专著《贵金属新材料》1部,获得国家发明专利授权5项。 蔡宏中,昆明贵金属研究所教授级高级工程师、硕士研究生导师。2000年中南大学材料系金属材料及热处理专业本科毕业,2005年昆明贵金属研究所材料学专业硕士毕业后到昆明贵金属研究所工作至今,2021年昆明理工大学材料学专业博士毕业。目前主要从事稀贵金属材料、高温抗氧化涂层等方面的研究工作。发表论文30余篇,包括International Journal of Electrochemical Science、Materials Science and Engineering A、Materials Research Express、《稀有金属材料与工程》《物理学报》《贵金属》等。weiyan@ipm.com.cn;chz@ipm.com.cn
罗圆, 王献, 赵君, 胡昌义, 张大伟, 魏燕, 张诩翔, 蔡宏中. Pt-Co-Mn合金组织结构及性能研究[J]. 材料导报, 2023, 37(10): 21060215-5.
LUO Yuan, WANG Xian, ZHAO Jun, HU Changyi, ZHANG Dawei, WEI Yan, ZHANG Xuxiang, CAI Hongzhong. Study on the Microstructure and Properties of Pt-Co-Mn Alloy. Materials Reports, 2023, 37(10): 21060215-5.
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2023, Vol. 37 
