Anasiei Ioana, Mitrica Dumitru, Badea Ioana-Cristina, Șerban Beatrice-Adriana, Trapp Johannes, Storz Andreas, Carcea Ioan, Olaru Mihai Tudor, Burada Marian, Constantin Nicolae, Matei Alexandru Cristian, Popescu Ana-Maria Julieta, Ghiță Mihai
National R&D Institute for Non-Ferrous and Rare Metals, 102 Biruinței, 077145 Bucharest, Romania.
Fraunhofer Institute for Manufacturing Technology and Advanced Materials-IFAM, Winterbergstr. 28, 01277 Dresden, Germany.
Materials (Basel). 2023 Jul 18;16(14):5067. doi: 10.3390/ma16145067.
The paper studies new materials for brake disks used in car manufacturing. The materials used in the manufacturing of the brake disc must adapt and correlate with the challenges of current society. There is a tremendous interest in the development of a material that has high strength, good heat transfer, corrosion resistance and low density, in order to withstand high-breaking forces, high heat and various adverse environment. Low-density materials improve fuel efficiency and environmental impact. Complex concentrated alloys (CCA) are metallic element mixtures with multi-principal elements, which can respond promisingly to this challenge with their variety of properties. Several compositions were studied through thermodynamic criteria calculations (entropy of mixing, enthalpy of mixing, lambda coefficient, etc.) and CALPHAD modeling, in order to determine appropriate structures. The selected compositions were obtained in an induction furnace with a protective atmosphere and then subjected to an annealing process. Alloy samples presented uniform phase distribution, a high-melting temperature (over 1000 °C), high hardness (1000-1400 HV), good corrosion resistance in 3.5 wt.% NaCl solution (under 0.2 mm/year) and a low density (under 6 g/cm).
本文研究了汽车制造中用于制动盘的新材料。制动盘制造中使用的材料必须适应并与当前社会面临的挑战相关联。人们对开发一种具有高强度、良好热传递、耐腐蚀性和低密度的材料有着极大的兴趣，以便承受高制动力、高温和各种不利环境。低密度材料可提高燃油效率并减少对环境的影响。复杂集中合金（CCA）是含有多种主要元素的金属元素混合物，其具有多种性能，有望应对这一挑战。通过热力学标准计算（混合熵、混合焓、λ系数等）和CALPHAD建模研究了几种成分，以确定合适的结构。所选成分在有保护气氛的感应炉中获得，然后进行退火处理。合金样品呈现出均匀的相分布、高熔点温度（超过1000°C）、高硬度（1000 - 1400 HV）、在3.5 wt.% NaCl溶液中具有良好的耐腐蚀性（低于0.2 mm/年）以及低密度（低于6 g/cm³）。
