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Findings on Ceramics Discussed by A. Abdollahi and Co-Researchers [Effect of B4C, MoSi2, nano SiC and micro-sized SiC on pressureless sintering...

July 8, 2014



Findings on Ceramics Discussed by A. Abdollahi and Co-Researchers [Effect of B4C, MoSi2, nano SiC and micro-sized SiC on pressureless sintering behavior, room-temperature mechanical properties and fracture behavior of Zr(Hf)B-2-based composites]

By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Ceramics. According to news originating from Tehran, Iran, by VerticalNews correspondents, research stated, "In the present paper, ZrB2-HfB2 composite was developed via a pressureless sintering method and SiC, MoSi2 and B4C powders were used as additives. In order to produce composite samples, ZrB2 is first milled for 2 h, afterwards the reinforcing particles were added."

Our news journalists obtained a quote from the research, "The mixture was formed by cold isostatic press (CIP) and, after the pyrolysis, it was sintered at 2100 degrees C and 2150 degrees C. In order to compare the effect of different additives on pressureless sintering behavior of ZrB2-HfB2 composite, the shrinkage percentage of samples was measured both before and after the sintering, and the microstructure of samples was examined using scanning electron microscopy (SEM), equipped with EDS spectroscopy. Bending test and resonance frequency method were used to measure the strength and the elastic modulus of the samples, respectively. The results show that samples containing MoSi2 and SiC nanoparticles had the maximum flexural strength and elastic modulus."

According to the news editors, the research concluded: "Moreover, the flexural strength and elastic modulus of the samples increased as the sintering temperature rose from 2100 degrees C to 2150 degrees C, suggesting that a temperature increase leads to an improved sintering process."

For more information on this research see: Effect of B4C, MoSi2, nano SiC and micro-sized SiC on pressureless sintering behavior, room-temperature mechanical properties and fracture behavior of Zr(Hf)B-2-based composites. Ceramics International, 2014;40(7):10767-10776. Ceramics International can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Ceramics International - www.elsevier.com/wps/product/cws_home/405926)

The news correspondents report that additional information may be obtained from A. Abdollahi, Malek E Ashtar Univ, Fac Mat & Mfg Proc, Tehran, Iran.

Keywords for this news article include: Iran, Asia, Tehran, Ceramics

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Source: Journal of Technology


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