WB2与WB4材料的合成机理、微观机构与性能研究

Synthesis mechanism, microstructures and properties of WB2 and WB4 were researched, kinetic parameters has been determined and identified the restrictive steps, determine the phase formation mechanism of B-W system and mechanism of diffusion between elements. Study on the reaction dynamics and densification sintering properties of WB2 and WB4 by optimizing the conventional and hot-press sintering process to reveal the preparation condition, nonstoichiometry of ratio as well as the impurity-effect control-theory of material. Microstructure, materials distribution of interface and morphological of tungsten boride were characterized by XRD, SEM , TEM, IR and Raman spectrum to reveal the effect of microstructure on mechanical, oxidation, friction, wear and neutron shielding properties, so as to find a new way to improve comprehensive properties.The research results will help to understand and grasp the synthesis and preparation technology of tungsten boride, the relation between microstructure and property which can provide the basic data in applying material in the field of metallurgy, mechanical engineering, national defence, aerospace engineering and nuclear industry.

对WB2与WB4材料的合成机理、微观结构和性能进行基础性探索研究,测定了反应动力学参数，找出限制性步骤，弄清B-W体系的相形成机制与元素间的扩散机理；通过优化热压和常压烧结工艺，深入研究其反应动力学过程和致密化烧结特性，揭示低温烧结制备WB2与WB4材料的条件、非化学计量比以及杂质效应控制原理；采用XRD、SEM、透射电镜、红外和电子拉曼等手段对硼化钨材料的微观结构、界面物质分布与形态进行表征，揭示材料微观结构对材料的力学性能、高温氧化性能、摩擦磨损性能、中子屏蔽性能的影响规律及其机理，探讨提高硼化钨新材料综合性能的新途径。项目的研究成果对于了解和掌握硼化钨材料的合成和制备工艺、微观结构和性能之间的关系与制约规律具有重要的意义，可以为其在冶金、机械、国防、航空航天和核能等领域的应用提供必要的基础性研究数据。

对WB2与WB4材料的合成机理、微观结构和性能进行基础性探索研究,测定了反应动力学参数，找出限制性步骤，弄清B-W体系的相形成机制与元素间的扩散机理；通过优化热压和常压烧结工艺，深入研究其反应动力学过程和致密化烧结特性，揭示低温烧结制备WB2与WB4材料的条件、非化学计量比以及杂质效应控制原理；采用XRD、SEM、透射电镜、红外和电子拉曼等手段对硼化钨材料的微观结构、界面物质分布与形态进行表征，揭示材料微观结构对材料的力学性能、高温氧化性能、摩擦磨损性能、中子屏蔽性能的影响规律及其机理，探讨提高硼化钨新材料综合性能的新途径。项目的研究成果对于了解和掌握硼化钨材料的合成和制备工艺、微观结构和性能之间的关系与制约规律具有重要的意义，可以为其在冶金、机械、国防、航空航天和核能等领域的应用提供必要的基础性研究数据。