Combustion synthesis of ZrB2―SiC composite powders ignited in air
Combustion synthesis of ZrB2―SiC composite powders ignited in air
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DOI：
10.1016/j.matlet.2009.03.038
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发表时间：
2009-06
影响因子：
3
通讯作者：
Wen-Wen Wu-Wen;Guo‐Jun Zhang;Y. Kan;Pei-ling Wang
中科院分区：
文献类型：
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作者：
Wen-Wen Wu-Wen;Guo‐Jun Zhang;Y. Kan;Pei-ling Wang
以Zr、B4 C和Si的混合物为原料，采用燃烧合成法在空气中合成了ZrB 2-SiC复合粉末。结果表明，空气气氛在SHS反应的点火过程中起着重要的作用。另外还合成了三种不同ZrC含量的ZrB_2-SiC-ZrC复合粉体，并对其点火时间进行了测定，以更好地了解点火机理。结果表明，制备的复合粉体粒径小于1 μm，氧含量低至0.4wt.%，获得了
ZrB2–SiC composite powders have been synthesized by combustion synthesis in air, using a mixture of Zr, B4C and Si as raw materials. It was found that the air atmosphere has played an important role in the ignition process of the SHS reaction. Three other kinds of ZrB2–SiC–ZrC composite powders with different ZrC content were also synthesized, and the ignition time has been measured for better understanding the ignition mechanism. As a result, the composite powders with particle size smaller than 1 µm and oxygen content as low as 0.4 wt.% were obtained.