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bg视讯材料学院2020博士论坛系列报告二

bg视讯

zhujiangren:wudayong、liudan

bg视讯shijian:2020nian10yue7rixiawu2:00-4:00

didian:cailiaolou357

zhujiangrenjianjie:

wudayong,gongxueboshi,2015nianbiyeyuyanshandaxue,2014nianzaizhongxindaikagufenyouxiangongsicailiaoyanjiuzhongxindanrenweihejinhuafangxiangyanjiuzuzhang,2017nianruzhibgshixuncailiaokexueyugongchengxueyuan,xiaopinfujiaoshou。fabiaoscilunwenshiyupian,shouquanfamingzhuanli3xiang,chengdanshengzhongdianxiangmu1xiang,huohebeishengbajianrencaichenghao。

bg视讯liudan,gongxueboshi,2019nian10yuebiyeyudongbeidaxue,tongnian12yueruzhibgshixuncailiaoxueyuan,cengzaishenyangcailiaokexueguojiayanjiuzhongxinfushiyufanghuyanjiubucongshijinshucailiaoweishengwufushijijiliyanjiu,yidiyijigongtongzuozhezaijournal of materials science and technology(yiqutop)dengqikanfabiaowenzhangbapian。

neirongjianjie:

一. NbB2bg视讯表面异构颗粒的形成机制及其对Al-Si合金细化的影响

通过引入Ti原子使NbB2表面发生重构,形成NbB2表面(Ti-Nb层)异构颗粒,目的使粒子在保留抗Si毒化的同时具备高效的细化能力。采用热分析(TA/DSC)、精细结构表征(HRTEM/STEM+MAPPING)与模拟计算(QSTEM/VASP)相结合的手段,研究异构层的形成及其促进α-Al形核机制,通过微观结构判据与界面稳定性计算等完善并丰富Ti、Nb细化理论,为新型表面异构细化粒子的设计提供理论基础;探究热力学条件以及Ti、Nb浓度对异构形成行为与对α-Al细化的影响规律,实现NbB2表面Ti-Nb异构层的可调控制备与细化能力评估。所研究的NbB2bg视讯表面异构颗粒可望为(表面)异构颗粒及其细化理论的发展起到“抛砖引玉”的作用,在获得具有创新性的研究结果的同时,为新型抗Si毒化细化产品的设计和研发提供技术支撑,并推动高强韧Al-Si合金材料的产业发展。

bg视讯er. jinshucailiaoweishengwufushi

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