Fracture strength of low-pressure injection-moulded reaction-bonded silicon nitride

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Department of Materials Science and Engineering


Reaction-bonded silicon nitride (RBSN) samples were fabricated via a low-pressure injection-moulding technique. Sample batches of 58, 68, and 70 vol % silicon solids loading were moulded using a multicomponent, nonaqueous binder. These samples were analysed in terms of their nitrided bulk density, flexural strength, and microstructure. Bulk densities of 2.9 g cm-3 (91% theoretical density) and three-point moduli of rupture in excess of 304 MPa (44×103 p.s.i.) were achieved. These results indicate a potential use of low-pressure injection moulding as a forming technique for the fabrication of RBSN components.

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© 1991 Chapman and Hall Ltd. Publisher’s version of record:

Publication Title

Journal of Materials Science