本月制备 如何得到最佳制备效果

2025年每个月都将有精彩的材相学见解等着您！点击来了解更多关于我们令人兴奋的样品制备或从我们的专家那里获得有趣的提示和技巧。期待我们每月的亮点！

本月以前及后续的制备

二月 铸铝和灰口铸铁之间的边界

在交通运输领域，尤其是汽车应用中，轻量化多材料设计（MMD）的趋势正变得愈发重要。这一趋势是由对可持续性、成本优化和性能提升的不断增长的需求所推动的。多材料设计涉及在单个部件中战略性地整合不同材料，以满足特定的技术要求，同时能够生产出经济高效的轻质部件。通过利用各种材料的互补特性，工程师们能够优化车辆部件的结构完整性、重量和成本，从而提高整体性能和资源效率。 铝/铁双金属复合材料作为多材料系列中的一种，兼具铁（钢/铸铁）的高强度和耐磨性以及铝（铝合金/纯铝）的高导热性、耐腐蚀性和轻质特性。本月，您将体验这些部件的金相制备过程，从切割到精抛。

四月 具有开放孔隙的热喷涂Al₂O₃涂层

Al_₂O_₃-based thermal spray coatings are important components in various industrial applications, especially in areas where surfaces need to be protected from high temperatures and corrosive environments. Properties of Al_₂O_₃-based spray coatings include high temperature resistance, corrosion resistance and wear resistance. There are various methods of thermal spraying, including: Plasma spraying, flame spraying and high velocity oxygen fuel (HVOF) spraying. After the metallographic preparation of these coatings, the first question is always whether the coating is correctly prepared and the image under the light microscope/SEM should be as it is or whether the artifacts of the preparation are present in my microstructure. QATM's preparation methods according to DVS (German Society for welding and related procedures) data sheets guarantee the correct preparation of the spray protection coatings without preparation artifacts.

六月 Hardness mapping on an edge-hardened gear wheel, tested with HV 1.

八月 Dendritic structure of a CoCrMo cast alloy after fine polishing.

十月 Microstructure of an edge-hardened gear with a ferrite-pearlite base structure, etched with 3% alcoholic nitric acid.

十二月 Microstructure of a nodular cast iron (GJS) after etching with nitric acid with and without using a lambda plate.