杨萌柳;周能雨;严寒;张豪;严明;

• 1:湖北工业大学材料与化学工程学院
• 2:湖北省绿色轻工材料重点实验室
• 3:湖北工业大学绿色轻质材料与加工协同创新中心

摘要(Abstract)：

以Nb,Al,NbC粉末为原料，采用石英管封口方式无压制备Nb_2AlC陶瓷。通过调节工艺参数，在1400℃，Nb∶Al∶NbC=1∶1.2∶1，保温4 h的条件下合成了纯度高，重复性好的Nb_2AlC陶瓷，避免了传统通氩气方式中隔绝氧气效果的不稳定。同时与原料为Nb,Al,C三种单质相比，烧结温度由1600℃降低至1400℃。且SEM电镜中Nb_2AlC表现出明显的层状结构，晶粒发育均匀，粒径为1～3μm。能谱分析表明Nb与Al的比值符合Nb_2AlC的原子比。选区电子衍射花样图谱计算得出的晶格常数与理论值接近。通过600～1400℃各温度下的物相分析，探究无压烧制Nb_2AlC陶瓷的相形成机理。

关键词(KeyWords)： MAX;Nb2AlC;无压合成;相形成

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年项目（51302073）;; 绿色轻工材料湖北省重点实验室开放基金（202027B11）;; 湖北省大学生创新创业训练计划(S202010500061)

作者(Authors): 杨萌柳;周能雨;严寒;张豪;严明;

DOI: 10.16521/j.cnki.issn.1001-9642.2022.04.005

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