In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 23, No. 6 ( 2008-06), p. 1713-1721
Abstract:
A polymer, which by pyrolysis transforms into Al–C–N–(O) ceramics, was synthesized from trimethylamine alane and cyan amide, and its applicability as a sintering additive for Si 3 N 4 was investigated. Si 3 N 4 powders were mixed with the precursor by treatment with organic slurries of the precursor to induce the homogeneous distribution of the additive. The green-bodies were pretreated in air or NH 3 at 800 °C to control the chemical composition of the additive, through which the densification of Si 3 N 4 could be improved. Dense samples with very fine grains ( 〈 2 μm) were obtained after sintering at 1600 °C in 0.1 MPa N 2 . Besides silicon nitride, submicrometer silicon carbide particles were observed in the samples, indicating that this procedure (i.e., the use of this novel sintering additive) also allows for the fabrication of SiC–Si 3 N 4 composites.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/JMR.2008.0225
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2008
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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