Preparation of O′-Sialon-based ceramics by two-stage liquid phase sintering and study on the toughening mechanism of ultrafine-grained sintered clusters

Ultrafine‐grained β‐Sialon fabricated by two‐stage sintering and study on diffusion toughening of Ti–22Al–25Nb

“…The loads were 9.8, 19.6, 49, and 98 N. In addition, the fracture toughness was calculated by the traditional indentation method. 21,23…”

“…The Vickers hardness at room temperature was obtained by the Vickers hardness measurement (HTV‐PHS30, Archimedes Industry Technology Co. Ltd., United Kingdom). The loads were 9.8, 19.6, 49, and 98 N. In addition, the fracture toughness was calculated by the traditional indentation method 21,23 …”

“…Metal powder additives have stable melting points and excellent toughness and plasticity, and it is not easy to generate multicomponent low-melting liquid phase with other sintering materials during sintering, which provides the possibility of controlling the densification and toughening of Sialon ceramics in stages. [17][18][19][20] In a previous research report, 21 the authors first proposed two-stage liquid-phase sintering technology with inorganic composite additives (Al 2 O 3 -Y 2 O 3 ) and GH4169 superalloy powder as composite additives and fabricated ultrafine-grained O′-Sialon ceramics with excellent fracture toughness, which realized the phased control of densification and toughening of Sialon-based ceramics.…”