In situ fabrication of ZrB2-SiC composite powders with controllable morphology by a two-step calcination method

In situ fabrication of ZrB2-SiC composite powders with controllable morphology by a two-step calcination method
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两步煅烧法原位制备形貌可控的ZrB2-SiC复合粉末

DOI:
10.1016/j.jssc.2019.02.042
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发表时间:
2019-05
影响因子:
3.3
通讯作者:
Qiang Zhen
Qiang Zhen
中科院分区:
化学3区
文献类型:
--
作者:
Shaolei Song;Yuehua Lin;Yongli Fan;Rong Li;Pengfei Hu;Qiang Zhen

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为了获得形貌可控的ZrB 2-SiC复合粉体,设计了两步煅烧法(TSC),将ZrB 2(1300 °C)和SiC(1400 °C)的形成过程分开,有利于ZrB 2棒的生长和自组装。此外,Si含量也影响最终产物的形貌。结果表明,在较低Si含量的ZrB 2-SiC中,直径为1-2 μm、长径比为1.8的ZrB 2棒呈随机分布,但随着Si含量的增加,ZrB 2棒开始定向排列并组装成团簇。TSC法制备的含30 vol% SiC的ZrB 2-SiC中,ZrB 2呈团簇状,球形SiC颗粒均匀分散在棒间。
In order to obtain controllable morphology ZrB2-SiC composite powders, a two-step calcination method (TSC) was designed to separate the formation process of ZrB2(1300 °C) and SiC (1400 °C), which is beneficial to the growth and self-assembly of ZrB2rods. Besides the Si content also affected the morphology of final product. The results show that in ZrB2-SiC with lower Si content, ZrB2rods with a diameter of 1–2 μm and aspect ratios of ∼8 are randomly distributed, but with increasing Si addition, ZrB2rods started to be oriented arrange and assembled to clusters. The ZrB2-SiC with 30 vol% SiC obtained by TSC had the ZrB2with clusters, and spherical SiC particles well dispersed among rods.
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