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Ceramic binder gradient hard alloy cutter material and preparation method thereof
The invention belongs to the technical field of hard alloy materials, and particularly relates to a ceramic binder gradient hard alloy cutter material and a preparation method thereof. According to the invention, TiN with a cubic structure and ZrO2 with a hexagonal closest packing structure are used as a composite ceramic bonding phase, solid solution activated sintering and micro-liquid phase reinforced sintering are cooperated, meanwhile, the grain size is set to be nanoscale, and silicon carbide nanowires and two-step spark plasma sintering are cooperated, so that the composite ceramic is obtained. High-density configuration of the ceramic binder hard alloy cutter material is realized by integrating various favorable sintering factors; the combination of component strengthening and toughening and structural strengthening and toughening is proposed, a microcosmic layered and macroscopic gradient multi-stage structure configuration is designed, cracks are protected layer by layer and eliminated in situ, the old thought of simple compounding of complex components is broken through essentially, and a traditional strengthening and toughening phase is loaded through a low-dimensional strengthening and toughening phase (graphene and silicon carbide nanowires), so that the high-strength and high-toughness composite material is obtained. A traditional strengthening and toughening mechanism and novel strengthening and toughening mechanisms such as graphene are introduced, surface residual compressive stress strengthening and toughening are introduced by applying a gradient structure, and finally a multi-stage strengthening and toughening mechanism with multi-element and multi-scale characteristics is formed.
本发明属于硬质合金材料技术领域，特别涉及一种陶瓷黏结相梯度硬质合金刀具材料及其制备方法。本发明以立方结构TiN和六方最密堆积结构ZrO2作为复合陶瓷黏结相，协同固溶活化烧结和微液相强化烧结，同时设置其晶粒尺寸为纳米尺度，协同碳化硅纳米线及二步放电等离子烧结，综合多种烧结有利因素实现陶瓷黏结相硬质合金刀具材料的高致密配置；提出组分强韧化韧与结构强韧化韧相结合，设计微观层状、宏观梯度的多级组织构型，对裂纹“层层设防、就地消灭”，从本质上突破复杂成分简单复合的旧思路，提出通过低维强韧相(石墨烯、碳化硅纳米线)负载传统强韧化相，引入传统强韧化机制与石墨烯等新型强韧化机制，同时应用梯度结构引入表面残余压应力强韧化韧，最终形成具有多元多尺度特征的多级强韧化机理。
Ceramic binder gradient hard alloy cutter material and preparation method thereof
The invention belongs to the technical field of hard alloy materials, and particularly relates to a ceramic binder gradient hard alloy cutter material and a preparation method thereof. According to the invention, TiN with a cubic structure and ZrO2 with a hexagonal closest packing structure are used as a composite ceramic bonding phase, solid solution activated sintering and micro-liquid phase reinforced sintering are cooperated, meanwhile, the grain size is set to be nanoscale, and silicon carbide nanowires and two-step spark plasma sintering are cooperated, so that the composite ceramic is obtained. High-density configuration of the ceramic binder hard alloy cutter material is realized by integrating various favorable sintering factors; the combination of component strengthening and toughening and structural strengthening and toughening is proposed, a microcosmic layered and macroscopic gradient multi-stage structure configuration is designed, cracks are protected layer by layer and eliminated in situ, the old thought of simple compounding of complex components is broken through essentially, and a traditional strengthening and toughening phase is loaded through a low-dimensional strengthening and toughening phase (graphene and silicon carbide nanowires), so that the high-strength and high-toughness composite material is obtained. A traditional strengthening and toughening mechanism and novel strengthening and toughening mechanisms such as graphene are introduced, surface residual compressive stress strengthening and toughening are introduced by applying a gradient structure, and finally a multi-stage strengthening and toughening mechanism with multi-element and multi-scale characteristics is formed.
本发明属于硬质合金材料技术领域，特别涉及一种陶瓷黏结相梯度硬质合金刀具材料及其制备方法。本发明以立方结构TiN和六方最密堆积结构ZrO2作为复合陶瓷黏结相，协同固溶活化烧结和微液相强化烧结，同时设置其晶粒尺寸为纳米尺度，协同碳化硅纳米线及二步放电等离子烧结，综合多种烧结有利因素实现陶瓷黏结相硬质合金刀具材料的高致密配置；提出组分强韧化韧与结构强韧化韧相结合，设计微观层状、宏观梯度的多级组织构型，对裂纹“层层设防、就地消灭”，从本质上突破复杂成分简单复合的旧思路，提出通过低维强韧相(石墨烯、碳化硅纳米线)负载传统强韧化相，引入传统强韧化机制与石墨烯等新型强韧化机制，同时应用梯度结构引入表面残余压应力强韧化韧，最终形成具有多元多尺度特征的多级强韧化机理。
Ceramic binder gradient hard alloy cutter material and preparation method thereof
一种陶瓷黏结相梯度硬质合金刀具材料及其制备方法
SUN JIALIN (Autor:in) / CAO ZHENNAN (Autor:in) / ZHANG KUIYIN (Autor:in) / XU XIN (Autor:in)
03.09.2024
Patent
Elektronische Ressource
Chinesisch
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