Composition useful for preparation of dense neodymium stabilised beta-silicon nitride-alpha-sialon composite

The present invention consists of a synergistic mixture of Si3N4, Al2O3, AlN, SiO2 and Nd2O3.The cost effective synergistic composition is useful for the preparation of dense neodymium stabilised .beta.-Si3N4-.alpha.-SiAlON composite of the order of >98% theoretical density, having high hardness and high fracture toughness.The dense .beta.-Si3N4-.alpha.-SiAlON composite will be useful for low temperature applications as wear parts like bearing and roller materials and particularly for grinding and milling operations like grinding balls.

Patent Assignee: Council of Scientific & Industrial Research (CSIR)

Patent No: US7129191 [USA]

Application No: 10/974,013

Inventor(s): Bandyopadhyay, Siddhartha; Maity, Himadri Sekhar

Issue Date: 31-10-2006

Filing Date: 27-10-2004

Licensing Option: Laboratory willing to jointly develop technology with industrial partner.

Implementing institute: CSIR-Central Glass and Ceramic Research Institute [CSIR-CGCRI]

Funding agency: Council of Scientific and Industrial Research (CSIR)

IPC Classification: C04B35/596, C04B35/599

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