Hybrid laser sintering method for manufacturing of metallic glasses

属于金属玻璃组的材料具有非晶结构。与其他金属材料相比，它们具有出色的机械性能，因此适合生产受机械应力的微型部件。如今，制造工艺的范围有限，需要进行研究来制造复杂的几何元素，以防止材料再结晶。为此，必须避免超过材料的再结晶温度。该研究项目的目的是开发一种混合工艺，用于用粉末非晶金属制造复杂的 3 维工件。因此，能量通过压缩以机械方式同时通过激光辐射以热方式提供。通过蓝宝石制成的透明模具将激光能量施加到金属粉末上。通过这种力和温度控制的烧结过程，一方面可以产生所需的材料内聚力，另一方面，由于不超过再结晶温度，可以获得特定的材料性能。通过分析和数值建模、实验和技术系统工程，将确定合适的工艺窗口，并实现系统技术。

Materials belonging to the group of metallic glasses have an amorphous structure. They are suitable for the production of mechanically stressed micro components because of their outstanding mechanical properties compared to other metallic materials. Today there is only a limited range of manufacturing processes, and there is a need for research to enable the manufacturing of complex geometry elements preventing the material from recrystallization. For this purpose, exceeding the recrystallization temperature of the material must be avoided. The aim of this research project is the development of a hybrid process for the manufacturing of complex 3-dimensional workpieces from powdered amorphous metals. Energy therefore is supplied coevel mechanically by compression and thermally by laser radiation. The application of laser energy to the metal powder is effected through transparent molds made of sapphire. By such a force- and temperature controlled sintering process, the required material cohesion can be generated on the one hand and on the other hand, the specific material properties can be obtained because the recrystallization temperature is not exceeded. By analytical and numerical modeling, experiments and technical systems engineering suitable process windows will be identified, and system technology will be realized.