Quantum-mechanic design and evaluation of precious metal coatings for the reduction of glass adhesions during an isothermal molding process

用于减少等温成型过程中玻璃粘附的贵金属涂层的量子力学设计和评估

• 批准号: 285743263
• 负责人: Professor Dr.-Ing. Fritz Klocke
• 金额: --
• 依托单位: Werkzeugmaschinenlabor - WZL
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/285743263?language=en
• 关键词: Quantum; mechanic; design; evaluation; precious

During the isothermal glass molding process of Precision Glass Molding, coated molding tools are exposed to a dynamic set of stress and frictional loads between glass and coating. As a result, precious metal coatings predominantly applied show characteristic glass adhesions, whose reasons for the formation are currently not understood. Hence, a knowledge-based approach for the reduction of wear phenomena by purposeful adjustment of the coating system is currently not available. The heuristic approaches currently applied are time, material and cost intensive and did not lead to successes regarding the reduction of glass adhesions. However, it is known, that the adjustment of adhesion and top layer of the coating system has a decisive influence on the stability of the coating, and on the standard life time of the molding tools, respectively. The quantum mechanics-based modeling of the interface between coating and polymers provided a promising approach for the assessment of the strength of glass adhesion on different coatings. The aim of the proposed project is therefore the fundamental investigation simulation-based modeling of the reasons for glass adhesions on precious metal coatings under typical process conditions. Within the project, fundamental mechanisms for glass adhesions for a commonly used glass (B270; distributor: Schott) are to be identified by by a quanum-mechanical description of the interactions on an atomic scale. Based on these interaction descriptions, coating composition alternatives are to be predicted. Coating alternatives, i.e. predictions of the model, are to be evaluated experimentally.

在精密玻璃成型的等温玻璃成型过程中，涂层成型工具暴露于玻璃和涂层之间的一系列动态应力和摩擦载荷。因此，主要应用的贵金属涂层显示出特有的玻璃粘附，其形成原因目前尚不清楚。因此，通过有目的地调整涂层系统来减少磨损现象的基于知识的方法目前不可用。目前应用的启发式方法是时间、材料和成本密集型的，并且没有导致关于减少玻璃粘附的成功。然而，已知的是，涂层系统的粘附力和顶层的调节分别对涂层的稳定性和模制工具的标准寿命具有决定性影响。基于量子力学的涂层与聚合物界面建模为评估不同涂层上玻璃粘附强度提供了一种有前途的方法。因此，拟议项目的目的是对典型工艺条件下贵金属涂层上玻璃粘附的原因进行基于模拟的基础研究建模。在该项目中，常用玻璃（B270;经销商：Schott）的玻璃粘附的基本机制将通过原子尺度上相互作用的量子力学描述来确定。基于这些相互作用的描述，涂料组合物的替代品是预测。涂层替代品，即模型的预测，将通过实验进行评估。

项目成果

Atomic diffusion induced degradation in bimetallic layer coated cemented tungsten carbide

• DOI: 10.1016/j.corsci.2017.01.007
• 发表时间: 2016-06
• 期刊: Corrosion Science
• 影响因子: 8.3
• 作者: Zirong Peng;M. Rohwerder;P. Choi;B. Gault;Thorsten Meiners;M. Friedrichs;H. Kreilkamp;F. Klocke;D. Raabe

Model of coating wear degradation in precision glass molding

• DOI: 10.1007/s00170-015-8005-2
• 发表时间: 2016-03
• 期刊: The International Journal of Advanced Manufacturing Technology
• 作者: F. Klocke;O. Dambon;M. Rohwerder;F. Bernhardt;M. Friedrichs;S. V. Merzlikin