Formation of Intermetallic Phases during Mechanical Alloying and Annealing of Cr + 20 wt % Al Mixtures

J. S. Kim; Y. S. Kwon; G. V. Golubkova; O. I. Lomovsky; D. V. Dudina; L. S. Davlitova; V. V. Malakhov; S. F. Tikhov; V. V. Usoltsev; V. A. Sadykov

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Formation of Intermetallic Phases during Mechanical Alloying and Annealing of Cr + 20 wt % Al Mixtures

机译：机械合金化和Cr + 20 wt％Al混合物的退火过程中金属间相的形成

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We have studied phase-formation processes in mixtures of Cr and Al (20 wt %) powders in the course of mechanical alloying (MA) and the phase transformations of the samples during subsequent annealing at temperatures of up to 800℃. The resultant x-ray amorphous intermetallic phases were identified by a differential dissolution method, which allows one to follow the formation of x-ray amorphous and partially crystallized phases. During MA of Cr + Al mixtures, the first to form is x-ray amorphous Cr_4Al, which then converts to partially crystallized Cr_2Al through reaction with aluminum. The peritectoid decomposition of Cr_4Al during heating of the MA samples is accompanied by heat release at 330-350℃. Heating to 420℃ leads to the formation of Cr_5Al_8. At 800℃, Cr_5Al_8 reacts with Cr to form Cr_2Al.

机译：我们研究了在机械合金化（MA）过程中Cr和Al（20 wt％）粉末混合物中的相形成过程，以及随后在高达800℃的温度下退火过程中样品的相变。通过微分溶解方法鉴定了所得的x射线非晶态金属间化合物相，该方法可以跟随x射线非晶态和部分结晶相的形成。在Cr + Al混合物的MA中，首先形成的是X射线非晶态Cr_4Al，然后通过与铝反应转化为部分结晶的Cr_2Al。在MA样品加热过程中Cr_4Al的周质分解伴随着330-350℃的放热。加热到420℃导致形成Cr_5Al_8。在800℃时，Cr_5Al_8与Cr反应生成Cr_2Al。

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来源
《Inorganic materials》 |2008年第6期|p.587-591|共5页
作者
J. S. Kim; Y. S. Kwon; G. V. Golubkova; O. I. Lomovsky; D. V. Dudina; L. S. Davlitova; V. V. Malakhov; S. F. Tikhov; V. V. Usoltsev; V. A. Sadykov;
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Research Center for Machine Parts and Materials Processing, University of Ulsan, 680-749 Korea;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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Formation of Intermetallic Phases during Mechanical Alloying and Annealing of Cr + 20 wt % Al Mixtures

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