摘要
以摩尔比为2∶1.2∶1的Cr、Al和C粉末为反应原料,在温度为700～1450℃时反应合成Cr2AlC陶瓷。利用差热分析方法测定原始粉末在热反应时的特征温度,并利用X射线衍射对反应产物进行物相分析。结果表明,700～1250℃之间主要产物是Cr9Al17、Cr5Al8和Cr2Al。1250～1350℃之间主要产物是Cr2AlC和少量的Cr7C3相,且Cr2AlC相的含量随着温度的增加而增加。当温度为1450℃时,目标产物Cr2AlC相的量变少,Cr7C3相的量增多。
Using Cr, Al and C powders （Cr ： Al ： C=2 ： 1.2 ： 1, mol%） as the reaction raw materials, Cr2AlC ceramics were synthesized under the 700 - 1450℃ . Material characteristic temperatures during the thermal reaction were defined by Differential thermal analysis （DTA） and phase composition of reaction products were analyzed by X-ray diffraction （XRD）. The results shows that the main products consist of Cr9Al17, Cr5Al8 and Cr2Al phases in the range of 700- 1250℃ . Between 1250℃ and 1350℃ , single phase Cr2AlC with small amount of Cr7C3 are produced, and Cr2AlC increase the amount of which increase with temperature. Up to 1450℃, the amount of target product Cr2AlC phase becomes less, instead of the increasing Cr7C3 phase.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2011年第6期28-30,共3页
China Ceramics
基金
河南省郑州市科技发展计划项目(2010GYXM630)
河南省教育厅自然科学基金项目资助(2009B430004)
关键词
Cr2AlC
陶瓷
差热分析
X射线衍射
Cr2AlC, Ceramics, Differential thermal analysis （DTA）, X-ray diffraction （XRD）
