Development of B6O-based materials for wear applications

开发用于磨损应用的 B6O 基材料

基本信息

批准号：
231419978
负责人：
Professor Dr. Hans-Joachim Kleebe
金额：
--
依托单位：
Institut für Angewandte Geowissenschaften (IAG)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/231419978?language=en
关键词：
Development B6O based materials wear

项目摘要

B6O materials are a promising candidate for the development of new superhard and wear-resistant materials. In prior works the applicants have discovered that sintering additives offer the possibility for a reproducible liquid phase-assisted densification of B6O by FAST/SPS (Spark Plasma Sintering) or HIP (hot-isostatic pressing). For the reproducible densification and the tailoring of the resulting material properties, it is essential to understand the processes taking place during densification and to develop microstructure-properties relationships for these materials. In the proposed project, B6O materials with different additive compositions and under the use of different sintering conditions will be prepared and characterized in respect to their microstructure and the resulting mechanical properties.The main scope of this study is a correlation of the developed microstructure (i.e. planar defects in B6O grains which are supposed to be responsible for the occurrence of abnormal grain growth in B6O materials) with the measured mechanical properties, in particular the hardness and the fracture toughness which are known to be major properties for controlling the wear resistance of materials. It is expected that a fundamental understanding of the currently unsolved questions regarding the occurring toughening mechanisms and the observed decrease of the hardness of polycrystalline B6O materials in comparison to single crystal data will result in tools which allow a tailoring of the microstructure and thus B6O materials with adjustable properties.

B6O材料是开发新超级和耐磨损材料的有前途的候选人。在先前的作品中，申请人发现烧结添加剂为通过快速/sps（火花等离子体烧结）或臀部（热相位按压）对B6O的可重复液相辅助致密性提供了可能性。对于可再现的致密化和所得材料特性的剪裁，必须了解在致密过程中发生的过程并开发这些材料的微观结构 - 培训关系。 In the proposed project, B6O materials with different additive compositions and under the use of different sintering conditions will be prepared and characterized in respect to their microstructure and the resulting mechanical properties.The main scope of this study is a correlation of the developed microstructure (i.e. planar defects in B6O grains which are supposed to be responsible for the occurrence of abnormal grain growth in B6O materials) with the measured mechanical properties, in尤其是已知的硬度和断裂韧性，这是控制材料耐磨性的主要特性。预计与当前未解决的问题有关发生的韧性机制以及观察到的多晶B6O材料硬度下降的基本理解与单晶数据相比，多晶B6O材料的硬度会导致工具，从而允许对微观结构进行裁缝，从而使B6O材料具有可调节性能。