Abstract
Surface nitridation of Alumina based composites reinforced with silicon carbide particles and/or whiskers has been studied. The composites processed by hot-pressing were post-treated by HIP process at 1650–1750°C under 150 MPa of nitrogen gas pressure. X-ray diffraction (XRD) analysis indicates that Alumina and silicon carbide on the surface of the composite are converted to aluminum nitride and silicon nitride, respectively, during the post-treatment. Examinations of surface nitrided layer by scanning electron microscopy (SEM) suggest that grain size can be significantly affected by post-treatment condition. Flexure tests indicate that strength increases significantly by the post-treatment. It is discussed that the improvement of mechanical properties included two parts: one came from the densification of sample, the other came from the surface nitrided layer. Specially, the residual compressive stress plays a key role on the improvement of the flexural strength.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G. K. WASTON, J. J. MOORE and M. L. MILLARD, Amer. Ceram. Soc. Bull. 64 (1985) 1253–1256.
S. DUTTA, 3rd Int. Symposium on Ceramic Material and Components for Engines, Las Vegas, 1988, p. 683.
D. H. STATZ, S. PROCHAZKA and J. LORENZ, J. Amer. Ceram. Soc. 68 (1985) 479.
F. F. LANGE, J. Mater. Sci. 10 (1975) 314.
M. MITOMO, M. TSUTSUMI, H. TANAKA, S. VENOSONO and F. SAITO, J. Amer. Ceram. Soc. 73(8) (1980) 2441–2445.
A. P. DRUSCHITZ and J. K. SCHROTH, ibid. 72 (1989) 1595–1597.
K. WATARI and K. ISHIZAKI, J. Ceram. Soc. Jpn., (Int. Ed.) 96 (1988) 535.
J. H. SHE, D. L. JIANG, S. H. TAN and J. K. GUO, Mater. Res. Bull. 26 (1991) 1277–1282.
D. L. JIANG, Key Eng., Mare.,Vols. 108-110, in "Ceramic Matrix Composites," edited by G. M. Newaz, H. Neber-Aeschbacher and F. H. Wohlbier (1995) p. 67.
P. GREIL, H. G. BOSSEMEYER and A. K LüNER, J. Eur. Ceram. Soc. 13 (1994) 159–168.
X. JIANG, L. P. HUANG, H. LI, X. W. SUN and X. R. FU, J. Chin. Inorgan. Mater. 9(3) (1994) 312–318.
Y. ITOH, Y. ISHIWATA and K. KASHIWAYA, J. Ceram. Soc. Jpn., (Int. Ed.) 97 (1989) 734.
H. P. KIRCHNER, R. W. GRUVER and R. F. WALKER, Trans. J. Brit. Ceram. Soc. 70 (1991) 215.
F. F. LANGE, J. Amer. Ceram. Soc. 63 (1980) 38.
D. L. JIANG, J. H. SHE, S. H. TAN and P. GREIL, ibid. 75(9) (1992) 2586–2589.
T. TIMOSHENKO and J. N. GOODIER, "Theory of Elasticity" (McGraw Hill, New York, 1970) p. 433.
G. C. WEI and P. F. BECHER, J. Amer. Ceram. Soc. 67(8) (1984) 571–577.
W. D. KINGERY, H. K. BOWEN and D. R. UHLMANN, "Introduction to Ceramics," 2nd edn. (John Wiley & Sons, Inc., Singapore, 1975) pp. 785, 791, 819.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Huang, Z., Cho, SJ., Jiang, D. et al. Surface nitridation of Al2O3 based composite by N2-HIP post-treatment. Journal of Materials Science 34, 2023–2027 (1999). https://doi.org/10.1023/A:1004591222040
Issue Date:
DOI: https://doi.org/10.1023/A:1004591222040