Material removal mechanisms in grinding of fiber-reinforced non-oxide ceramics

纤维增强非氧化物陶瓷磨削中的材料去除机制

基本信息

项目摘要

Due to a limited development potential in terms of thermal resistance of metallic superalloys, fiber-reinforced ceramics came into the focus of material developments. The grinding behavior and the material removal mechanisms in grinding of ceramics were analyzed for monolithic ceramics. It has been shown in several scientific works, that ductile grinding of brittle materials is possible. Although investigations regarding the grinding behavior of fiber-reinforced ceramics (ceramic matrix composites (CMCs)) were already published, the underlying material removal mechanisms are largely unknown. Also, the influence of a grinding process on the surface zone is only investigated sporadically. For an optimized process design, systematic tests considering the material removal mechanisms as well as a deep material understanding is necessary.The goal of the project is to develop a heuristic model for the material removal mechanisms in grinding fiber-reinforced non-oxide ceramics. Using the example of C/SiC and SiC/SiC ceramics, the influence of the fiber orientation and the fiber material on the machining characteristics will be described both, qualitatively and quantitatively. Furthermore, it will be explained, which cause-effect relationships between the grinding parameters and the resulting surface integrity zone exist and to what extent the effects of a grinding process can be influenced by the fiber orientation and fiber material. An empirical model will be developed, which describes the material removal mechanisms as a function of the material properties and the grinding process parameters. Based on the findings, a heuristic model will be derived, which explains the material removal mechanisms and the surface integrity zone properties of the workpiece after grinding on basis of the material properties.
由于金属高温合金在耐热性方面的发展潜力有限,纤维增强陶瓷成为材料发展的重点。分析了陶瓷磨削过程中的磨削行为和材料去除机理。几项科学研究表明,脆性材料的韧性磨削是可能的。虽然关于纤维增强陶瓷(陶瓷基复合材料(CMC))的磨削行为的研究已经发表,基本的材料去除机制在很大程度上是未知的。此外,磨削过程对表面区域的影响只是偶尔调查。为了优化工艺设计,必须进行考虑材料去除机理的系统试验以及对材料的深入理解。本项目的目标是开发纤维增强非氧化物陶瓷磨削材料去除机理的启发式模型。以C/SiC和SiC/SiC陶瓷为例,定性和定量地描述纤维取向和纤维材料对加工特性的影响。此外,还将解释磨削参数和所得到的表面完整性区域之间存在何种因果关系,以及磨削过程的效果在多大程度上受纤维取向和纤维材料的影响。将开发一个经验模型,该模型描述了材料去除机制作为材料特性和磨削工艺参数的函数。基于这些发现,将推导出一个启发式模型,该模型根据材料特性解释了磨削后工件的材料去除机制和表面完整区特性。

项目成果

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Professor Dr.-Ing. Thomas Bergs其他文献

Professor Dr.-Ing. Thomas Bergs的其他文献

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{{ truncateString('Professor Dr.-Ing. Thomas Bergs', 18)}}的其他基金

Methodology for generating cross-technology metamodels (IKTINO)
生成跨技术元模型的方法(IKTINO)
  • 批准号:
    441745638
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Basic analysis and optimization of the flow behavior of thermoplastics by adjusting the surface of electrical discharge machined injection molds (EDSIMP)
通过调整放电加工注塑模具 (EDSIMP) 的表面对热塑性塑料的流动行为进行基本分析和优化
  • 批准号:
    447707042
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Microstructure-sensitive fatigue lifetime assessment considering forming history effects
考虑成形历史影响的微观结构敏感疲劳寿命评估
  • 批准号:
    432053466
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Multi-scale modeling of the thermal workpiece load in the turning process considering the cutting fluid
考虑切削液的车削过程中工件热载荷的多尺度建模
  • 批准号:
    439919433
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Cost-optimized planning of changes in manufacturing of safety-critical components through systematic manufacturing change management
通过系统化的制造变更管理,对安全关键部件的制造变更进行成本优化规划
  • 批准号:
    437763513
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Product lifecycle-oriented optimization of the manufacturing phase and the use phase of precision tools
以产品生命周期为导向优化精密工具的制造阶段和使用阶段
  • 批准号:
    438069924
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Design model for the knowledge-based adjustment of the edge zone and surface properties of additive-manufactured components for guided centrifugal finishing
用于基于知识调整增材制造部件边缘区域和表面特性的设计模型,用于引导离心精加工
  • 批准号:
    429960079
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Compensation of Shape and Dimensional Deviations Due to Thermo-Elastic Deformation During Dry Machining
干式加工过程中热弹性变形引起的形状和尺寸偏差的补偿
  • 批准号:
    426824785
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants (Transfer Project)
Smooth Particle Hydrodynamic (SPH) Modeling of Grinding the SiC-SiC Ceramic Matrix Composite
SiC-SiC 陶瓷基复合材料磨削的光滑颗粒流体动力学 (SPH) 建模
  • 批准号:
    426949379
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Investigation of the interactions of incremental surface layer forming and HPPMS coating on fine blanking dies in order to enable a load-applied surface integrity adjustment (TEStOI)
研究精冲模具上增量表面层成形和 HPPMS 涂层的相互作用,以实现负载施加的表面完整性调整 (TEStOI)
  • 批准号:
    423492562
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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