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.

本研究项目主要研究基于高均匀性泡沫陶瓷预制体的互穿复合材料（IPC）的加工、表征和建模。所用预制件的微观结构均匀性对IPC中所得复合材料性能具有决定性作用。通过源自高温隔热材料制造且也应用于本提案背景下的创新发泡工艺，可以以工艺安全且资源高效的方式生产具有高度均匀微观结构和高开孔率的新型陶瓷泡沫。第一次。该项目中使用的泡沫预制件由Morgan Advanced Materials Haldenwanger GmbH公司提供，具有不同的孔体积含量，不需要成孔剂。由于这种专利工艺生产的预制件迄今尚未用于制造IPC，因此微观结构与性能的关系尚不清楚。此外，只有少数研究涉及近应用载荷下的侵彻IPC行为，特别是热机械疲劳。通过用AlSi 12合金渗透高度均匀的氧化铝泡沫预制件，可以实现进一步的轻质结构潜力，特别是在高热应力部件例如用于发动机部件的领域中。该研究项目对这些新的IPC有一个整体的看法。因此，计划的调查涉及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载荷、热载荷和热机械载荷条件。通过原位和非原位研究，分析和描述了不同载荷情况下的损伤行为，以准确了解复合材料中的损伤机制和损伤演化。这也将通过适当的方法在数值模型中进行。在此基础上，推导出了适合的疲劳寿命模型，并进一步发展。对于以后的应用，另一个有趣的方面是这些材料的自我修复潜力，到目前为止还没有研究过。出于这个原因，该项目的另一个目的是创建一个过应力后互穿复合材料的自我修复过程。