Research on the spheroidization performance and mechanism of TiC particle-reinforced powders

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-05-08 DOI:10.1016/j.powtec.2025.121104

Pengyu Liu , Ruihua Zhang , Hui Li , Mengzhi Xiao , Yan Yin , Chao Lu , Yicheng Yang , Cunliang Pan , Haiqiang Bai , Qiao Qiu , Shanchao Zuo

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引用次数: 0

Abstract

The irregular TiC particle-reinforced powder was spheroidized using radio-frequency plasma spheroidization technology. The phase, particle size distribution, fluidity, tap density, loose density, powder surface morphology and internal microstructure of the powder were studied by means of X- ray diffraction, scanning electron microscopy, transmission electron microscopy, powder particle size tester, and density tester. Moreover, the powder feeding process and melting state of the spheroidized powder were analyzed. The results show that: The phases of the powder before and after spheroidization are composed of TiC, austenite, and ferrite. The properties such as the fluidity, loose density, tap density, and angle of repose of the powder have all been improved, and the median particle size has decreased. The surface morphology of the spheroidized powder mainly presents five forms: spherical, ellipsoidal, rod - shaped, satellite-shaped, and irregular powder. Except for the irregular-shaped powder, a “crater” structure appears on the surface of other powders. The dislocations inside the TiC in the “crater” surface layer are mostly mixed dislocations. TiC shows a good interfacial relationship with ferrite and austenite. The strain field on the left side of the interface between TiC and ferrite is mainly compressive strain, and the sizes of the compressive-strain and tensile-strain regions on the left side of the interface between TiC and austenite are similar.

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TiC颗粒增强粉末球化性能及机理研究

采用射频等离子体球化技术对不规则TiC颗粒增强粉末进行球化处理。采用X射线衍射仪、扫描电镜、透射电镜、粉末粒度测定仪、密度测定仪对粉末的物相、粒度分布、流动性、丝锥密度、松散密度、粉末表面形貌和内部微观结构进行了研究。分析了球化粉末的加料过程和熔化状态。结果表明：球化前后粉末的相主要由TiC、奥氏体和铁素体组成。粉体的流动性、松散密度、攻丝密度、休止角等性能均得到改善，中位粒径减小。球化粉末的表面形貌主要呈现球形、椭球形、棒状、卫星形和不规则粉末五种形态。除了不规则形状的粉末外，其他粉末表面出现“陨石坑”结构。“坑”表层TiC内部的位错多为混合型位错。TiC与铁素体和奥氏体表现出良好的界面关系。TiC与铁素体界面左侧的应变场以压缩应变为主，TiC与奥氏体界面左侧的压缩应变区和拉伸应变区尺寸相似。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.