SGER: Development and Investigation of the Abrasion Resistance of New Ultra-Hard AlCrB14 Modified by TiB2 and Binder Phase for Even Higher Abrasion Resistance

SGER：通过 TiB2 和粘结剂相改性的新型超硬 AlCrB14 耐磨性的开发和研究，以获得更高的耐磨性

• 批准号: 0307094
• 负责人: Shyam Bahadur
• 金额: $ 6.96万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-02-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307094&HistoricalAwards=false
• 关键词: SGER; Development; Investigation; Abrasion; Resistance

Development and Investigation of the Abrasion Resistance of New Ultra-Hard AlCrB14 Modified by TiB2 and Binder Phase for Even Higher Abrasion ResistanceShyam Bahadur and Alan Russell, Iowa State University, Ames, IA, USAThe objective of this work is to study the abrasion behavior of ultra-hard boride materials. The abrasion resistance of the materials will be studied by single point abrasion at low speeds and multiple point abrasion at high speeds, and the effects of strain rate, temperature and oxidation effects will be analyzed. The mechanisms of material removal will be studied by electron microscopy of the abraded surfaces as well as the deformation in the substrate. As a part of the effort, it is intended to synthesize a new material AlCrB14, as a modified version of AlMgB14, and modify its grain structure and mechanical properties, including fracture toughness, by sub-micron size TiB2 additions for excellent abrasion resistance. The synthesis of the new material addresses to the environmental concerns involved in the processing of AlMgB14 boride because of the volatile and reactive Mg. If the processing is successful, super hard materials with hardness equal to or greater than that of cubic boron nitride (CBN) are expected to be obtained. If the processing of the new material is unsuccessful, the abrasion studies will be performed on AlMgB14 whose hardness is close to that of CBN. The materials will be characterized in terms of hardness, fracture toughness, and flexure properties and these will be related to the abrasion resistance. The project is cross-disciplinary involving materials development and further modification for enhanced tribological performance. The economic benefits of the newly developed materials for potential applications in earth moving, mining, rock drilling and other tool materials are tremendous.

通过TIB2和粘合剂阶段修饰的新超高alcrb14的耐磨性的开发和研究，以提高耐磨性的抵抗力，爱荷华州立大学，艾姆斯，IA，这项工作的usathe目的是研究超级硼化物材料的磨损行为。材料的耐磨性将通过低速下的单点磨损和高速磨损进行研究，并将分析应变速率，温度和氧化作用的影响。材料去除的机理将通过磨损表面的电子显微镜以及底物的变形来研究。作为努力的一部分，它旨在通过亚微米尺寸的tib2添加来合成新的材料Alcrb14，作为AlmGB14的修改版本，并修改其晶粒结构和机械性能，包括断裂韧性，以添加出色的耐磨性。新材料的合成涉及由于挥发性和反应性Mg而涉及的环境问题。如果处理成功，则预期将获得等于或大于立方硼（CBN）的超硬材料。如果新材料的处理不成功，则将对其硬度接近CBN的ALMGB14进行磨损研究。这些材料将以硬度，断裂韧性和弯曲性能来表征，这些材料将与耐磨性有关。该项目是跨学科的，涉及材料开发和进一步的修改，以增强摩擦学性能。新开发的材料在地球移动，采矿，岩石钻井和其他工具材料中的潜在应用的经济利益是巨大的。