Processing, Characterization and Modelling of Interpenetrating Metal Ceramics Composites based on high-homogeneous foam structures

基于高均匀泡沫结构的互穿金属陶瓷复合材料的加工、表征和建模

• 批准号: 397372123
• 负责人: Professorin Dr.-Ing. Katrin Schulz
• 金额: --
• 依托单位: Lehrstuhl für Hybride Werkstoffe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/397372123?language=en
• 关键词: Processing; Characterization; Modelling; Interpenetrating; Metal

The research project deals with the processing, characterization and modeling of interpenetrating composites (IPC) based on high-homogeneous ceramic foam preforms. The microstructural homogeneity of the preform used is decisive for the resulting composite properties in IPCs. With the innovative foaming process, which is derived from the manufacturing of high-temperature heat insulation and also applied in the context of this proposal, novel ceramic foams with a highly homogeneous microstructure and high fractions of open porosity can be produced in a process-safe and resource-efficient way for the first time. The foam preforms used in the project are provided by the company Morgan Advanced Materials Haldenwanger GmbH and feature different pore volume contents without the need of pore forming agents. Since such preforms produced by this patented process have not been used for the manufacturing of IPCs so far, the microstructure-property relationship is unknown. Furthermore, there are only few studies dealing with the behavior of penetration IPC under near-application loads, in particular with thermo-mechanical fatigue. By infiltrating the highly homogeneous alumina foam preform with an AlSi12 alloy, further lightweight construction potential, particularly in the area of thermally highly stressed components, e.g. for engine components, can be achieved. The research project has a holistic view on these novel IPCs. Hence, the planned investigations deal with the processing of the IPCs, including the process-accompanying analysis of the composite's constituents, the scientific characterization of the generated composites, as well as the modeling of these composites and the novel foam structures used. Near-application loads include mechanical, thermal and thermo-mechanical loading conditions. The damage behavior is to be analyzed and described in different load cases by in-situ and ex-situ investigations, in order to obtain a precise understanding of the damage mechanisms and the damage evolution in the composite. This is also to be made in a numerical model by means of suitable approaches. Based on the model, suitable fatigue-life models are derived and further developed. A further interesting aspect for later applications is the self-healing potential of these materials, which has not been investigated so far. For this reason, another aim of the project is the creation of a self-healing procedure of an interpenetrating composite after over-stresses.

该研究项目涉及基于高均质泡沫陶瓷预制件的互穿复合材料（IPC）的加工、表征和建模。所用预成型件的微观结构均匀性对于 IPC 中的复合材料性能至关重要。通过源自高温隔热材料制造并在本提案中应用的创新发泡工艺，可以在工艺安全的条件下生产具有高度均匀微观结构和高开孔率的新型陶瓷泡沫。首次实现资源高效利用。该项目使用的泡沫预制件由Morgan Advanced Materials Haldenwanger GmbH公司提供，具有不同的孔容含量，无需使用造孔剂。由于迄今为止通过该专利工艺生产的此类预成型件尚未用于制造 IPC，因此其微观结构与性能之间的关系尚不清楚。此外，只有很少的研究涉及渗透 IPC 在近应用载荷下的行为，特别是热机械疲劳。通过用 AlSi12 合金渗透高度均匀的氧化铝泡沫预制件，进一步实现轻量化结构的潜力，特别是在热高应力部件领域，例如：对于发动机部件来说，是可以实现的。该研究项目对这些新颖的 IPC 有一个整体的看法。因此，计划的研究涉及 IPC 的加工，包括复合材料成分的工艺伴随分析、生成的复合材料的科学表征，以及这些复合材料和所使用的新型泡沫结构的建模。近应用载荷包括机械、热和热机械载荷条件。通过原位和异位研究来分析和描述不同载荷情况下的损伤行为，以便准确了解复合材料的损伤机制和损伤演化。这也可以通过适当的方法在数值模型中进行。基于该模型，导出并进一步开发合适的疲劳寿命模型。对于后续应用来说，另一个有趣的方面是这些材料的自修复潜力，但迄今为止尚未得到研究。因此，该项目的另一个目标是创建互穿复合材料在过应力后的自修复程序。