Oxidation behavior of NiAl nanoparticles prepared by hydrogen plasma–metal reaction
Oxidation behavior of NiAl nanoparticles prepared by hydrogen plasma–metal reaction
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DOI：
10.1016/j.matchemphys.2007.08.003
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发表时间：
2008-02
影响因子：
4.6
通讯作者：
Z. Wang;W. Tian;Xingguo Li
中科院分区：
文献类型：
--
作者：
Z. Wang;W. Tian;Xingguo Li
采用氢等离子体-金属反应法制备了NiAl纳米颗粒。为了研究金属间纳米颗粒的氧化行为，采用透射电镜（TEM）、x射线衍射（XRD）和热重分析仪（TGA）研究了金属间纳米颗粒在空气中热处理过程中形貌、粒径和晶体结构的变化。在1073K的空气中，NiAl纳米颗粒的形状稳定，在空气中加热时，纳米颗粒周围形成的氧化膜有助于防止非颗粒生长和进一步氧化。NiAl纳米粒子的氧化过程在973K以下缓慢进行，在973K以上迅速进行。纳米NiAl被优先氧化为al2o3，形成NiO。
NiAl nanoparticles were synthesized by hydrogen plasma–metal reaction method. In order to study the oxidation behavior of the intermetallic nanoparticles, the changes in morphology, particle size and crystal structure during heat treatment in air were investigated by TEM, XRD and TGA. The NiAl nanoparticles were stable in shape at 1073K in air, the oxide film formed around the nanoparticles during heating in air was contributed to prevent the nonparticles growth and further oxidized. The oxidation of NiAl nanoparticles proceeded slowly below 973K and rapidly above this temperature. The NiAl nanoparticles were oxidized as Al2O3preferentially, and then NiO formed.