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首页> 外文期刊>Materials Science & Engineering. A, Structural Materials: Properties, Microstructure and Processing >(111-Specific reorientation and shape change of Co_(1-x)O particles within CaO grains
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(111-Specific reorientation and shape change of Co_(1-x)O particles within CaO grains

机译：（111-CaO晶粒内Co_（1-x）O粒子的特定取向和形状变化

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摘要

The Co_(1-x)O/CaO powders 1:9 in molar ratio were sintered and annealed at a rather high homologous temperature of 0.97 (1300 deg C) for 5 and 80 h in air. Transmission electron microscopy indicated that the intragranular Co_(1-x)O particles less than 0.7 mum in size, but not larger, fell into two epitaxial crystallographic relationships with respect to host CaO grains: predominantly [1 1-bar 1]_(Co_(1-x)O)//[1 1-bar 1]_(CaO), [011]_(Co_(1-x)O)//[1-bar 12]_(CaO) with a well developed (1 1-bar 1) habit plane and less commonly [11 1-bar]_(Co_(1-x)O)//[11 1-bar]_(CaO), [011]_ (Co_(1-x)O)//[011]_(CaO) with multiple yet less matched {111} habit planes. The primary epitaxial particles further changed into lath-like by forming a coherent (1 1-bar 1)_ (Co_(1-x)O)/(1 1-bar 1)_(CaO) interface at the expense of incoherent (111)_ (Co_(1-x)O)/(hkl)_(CaO) edges. Size and interfacial energetics dependence of orientation change of intragranular particles is in accordance with the mechanism of Brownian-type rotation of particles in terms of anchorage release at the Co_(1-x)O/CaO interface.
机译：摩尔比为1：9的Co_（1-x）O / CaO粉末在较高的同源温度0.97（1300℃）下在空气中烧结并退火5到80 h。透射电子显微镜表明，相对于主体CaO晶粒，粒径小于0.7微米但不大的Co_（1-x）O颗粒落入两种外延晶体学关系：主要为[1 1-bar 1] _（Co_ （1-x）O）// [1 1-bar 1] _（CaO），[011] _（Co_（1-x）O）// [1-bar 12] _（CaO） （1 1-bar 1）习惯平面，较少见[11 1bar] _（Co_（1-x）O）// [11 1-bar] _（CaO），[011] _（Co_（1- x）O）// [011] _（CaO）具有多个但不匹配的{111}习惯平面。通过形成相干的（1 1-bar 1）_（Co_（1-x）O）/（1 1-bar 1）_（CaO）界面，初级外延粒子进一步变为板条状，但代价是不相干（ 111）_（Co_（1-x）O）/（hkl）_（CaO）边缘。就Co_（1-x）O / CaO界面的锚固释放而言，颗粒内颗粒取向变化的大小和界面能学相关性符合颗粒的布朗型旋转机制。

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