Synthesis and properties of new β-Sialon/TiN composites via a novel AlxTiy intermediate
Source abstract
Abstract
Abstract A new synthesis of β-Sialon/TiN composites by reaction bonding of aluminium powder coated with nanosized titania is reported. A sol–gel method was used to coat the aluminium particles with titania and the resulting powder was calcined in an inert atmosphere to produce a Ti x Al y –Al 2 O 3 composite which was heat-treated in nitrogen to form an AlN–Al 2 O 3 –TiN composite. After addition of a suitable silicon phase and yttrium oxide as a nitridation and sintering aid, a β-Sialon/TiN composite was formed by reaction bonding under nitrogen. Young׳s modulus, hardness, fracture toughness, tensile strength and thermal shock resistance of the new composites were measured and compared with a standard β-Sialon fabricated by reaction bonding of Al 2 O 3 , AlN and Si under similar conditions.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Metal and Thin Film Mechanics · MXene and MAX Phase Materials
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