Dense SiC containing strongly aligned plate-like grains by magnetic treatment

作者：Lee S H^*; Feng L; Yin J; Lee J S; Zhu X; Suzuki T S; Sakka Y; Tanaka H

来源：Ceramics International, 2015, 41(3): 5079-5084.

DOI：10.1016/j.ceramint.2014.12.078

• Sintering
• Microstructure-final
• Mechanical properties
• SiC
• Magnetic treatment

Dense SiC having strongly aligned plate-like grains was prepared by slip casting under strong magnetic field and subsequent densification using Al3BC3 additive. Irregular-shaped 6H-SiC powders in the green body were strongly aligned by the magnetic treatment. Subsequently, Al3BC3 additive induced the formation of aligned plate-like SiC grains during densification. The hardness of SiC could be tailored up to 11% by the strong alignment of the grains. Crack deflection was also strongly affected by the direction of the aligned plate-like grains. As a result, the length of the cracks which propagated parallel to the elongated grains was 18.6% shorter compared to that formed perpendicular to the grains.

• 出版日期2015-4