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五月 用 10% 硝酸亚铁水溶液蚀刻后，电动马达铜销顶部激光焊缝的微观结构。
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！
Al₂O₃-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 Al₂O₃-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.
Ti-6Al-4V (Ti64)合金，也称为5级钛，是增材制造中使用最多的钛合金之一。由于它结合了强度、轻便性和耐腐蚀性等不同特性，使其对航空航天、汽车和医疗等广泛行业具有吸引力。Ti64 增材制造的一大优势是能够生产用于医疗应用的定制植入物。使用 QCUT 200 A 等精密切割机切割样品，可防止样品在切割过程中过热或产生机械变形。使用环氧树脂镶样并使用真空浸渍装置有助于在研磨/抛光之前填充所有孔隙。在研磨/抛光过程中使用正确的耗材可以防止材料涂抹，并使孔隙百分比测量更加准确。这个月，您可以在我们本月制备中了解所有这些要点。
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。
在球栅阵列（BGA）印刷电路板中，焊球对于 BGA 外壳与电路板之间的电气和机械连接至关重要。焊球的材料通常是无铅合金，因为含铅焊料由于环境和健康法规正日益受到限制。
最常见的无铅合金是 SAC305。这类锡合金在熔点、机械强度和导电性之间实现了平衡。例如，SAC305 的熔点约为 217 至 221 摄氏度，比含铅焊料略高。
对印刷电路板上的焊点进行金相检验是印刷电路板质量保证中常见的检验项目。本月的制备方法将向您展示如何为显微镜检查优化这种锡焊点的制备。
Al₂O₃-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 Al₂O₃-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.
