Combustion Synthesis of Ti3SiC2 in Air from 3Ti/Si/2C/0.2Al Powder Mixtures
Source abstract
Abstract
采用机械活化的3Ti/Si/2C/0.2Al单质粉体为原料,在空气中发生自燃反应,成功地合成了Ti3SiC2基材料.采用XRD、SEM和EDS等手段,分析了合成产物的相组成和微观结构特征.结果表明,机械合金化3Ti/Si/2C/0.2Al单质混合粉体,不仅细化了粉体颗粒,而且产生严重的晶格畸变,从而明显提高了粉体的反应活性.把机械活化的粉体暴露在空气中,会发生剧烈的燃烧反应,并引发自蔓延反应,合成Ti3SiC2,冷却后变成多孔块体产物.燃烧产物由Ti3SiC2、TiC和微量氧化物组成.产物中Ti3SiC2含量约为83wt%.产物表层比较致密和均匀,而内部则粗糙且多孔.产物的表面是以Al2O3和TiO2为主相的氧化膜,氧化物颗粒大小约为2~4μm.氧化膜厚度约为5~10μm,比较致密.内部为Ti3SiC2和TiC材料,板条状Ti3SiC2晶粒长约20~40μm,宽约2~4μm,发育完善.粒状TiC晶粒大小约为3μm.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: MXene and MAX Phase Materials · Advanced ceramic materials synthesis · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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