Volume 34, Number 4 (Journal of Advanced Materials-winter 2016)                   jame 2016, 34(4): 53-60 | Back to browse issues page



DOI: 10.18869/acadpub.jame.34.4.53

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Radmehr P, Zakeri A, Alamolhoda S. Effect of Excess Al in TiO2-Al Powder Mixture and Susceptor Material on Microwave Synthesis of TiAl/Al2O3 Composite. jame. 2016; 34 (4) :53-60
URL: http://jame.iut.ac.ir/article-1-750-en.html

Department of Metallurgical and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
Abstract:   (1782 Views)

In this research, TiAl/Al2O3 composite was synthesized from mechanically activated TiO2-Al powder mixtures using microwave heating.The initial powder mixtures were mechanically activated and pressed into cylindrical tablets and then heated in a microwave oven. The effect of different amounts of excess Al and microwave susceptor material (SiC or graphite) on the ignition time and the resultant reaction products were evaluated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were used for characterization of the synthesized samples. XRD patterns revealed that when there was no excess Al in the initial powder mixture, the main resulting intermetallic phase would be Ti3Al with negligible amounts of TiAl, while with 10 wt% excess Al, TiAl phase could be formed in the composite product.The results also showed that microwave synthesis took place faster and more reproducible when samples were packed in the graphite powder than when placed between two SiC blocks.

Full-Text [PDF 498 kb]   (557 Downloads)    
Type of Study: Research | Subject: General
Received: 2016/03/5 | Accepted: 2016/03/5 | Published: 2016/03/5

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