Abstract
Modified directed melt nitridation of pure Al block was investigated by using magnesium as an external dopant at 1373–1573 K during the flowing high pure N2. The products were characterized using optical microscope, X-ray diffractometer, scanning electron microscope and electron probe microanalysis techniques. Experimental results show that it is a lower costs way to synthesize AlN matrix or Al matrix materials by modified directed melt nitridation through adapting proper processing parameters. The weight gain rate increased significantly with the treating temperature and Mg content. Apparent activation energy of 208.7 KJ/mole was obtained in terms of the reaction rate involving nitridation, evaporation and transportation. AlN reinforced Al matrix material was fabricated with less Mg and AlN particles were enriched in the top part of the product with distinct boundary to the bottom Al. however, when the content of Mg was up to 10 wt% and treated at higher treating temperature, AlN phase dominated in the product with a relative looser structure.
Similar content being viewed by others
References
Newkirk MS, Lesher HD, Kennedy CR et al (1987) Ceram Eng Sci Proc 8(7–8):879
Mclachlan DR, Kuszyk JA (1996) Advances in refractories for the metallurgical industries II, Montreal, Quebec; Canada, p 237
Scholz H, Greil P (1991) J Mater Sci 26:669
Rodriguez-Reyes M, Pech-Canul MI, Parras-Medecigo EE et al (2003) Mater Lett 57:2081
Jin HB, Chen KX, Zhou HP et al (2000) J Inorg Mater 15(4):631 (in chinese)
Else B (1993) J Am Ceram Soc 76(7):1865
Scholz H, Greil P (1990) J Eur Ceram Soc 6:23
Yuan DW, Cheng VS, Yan RF et al (1994) Ceram Eng Sci Proc 15(4):85
Creber DK, Poste SD, Aghajanian MK et al (1988) Ceram Eng Sci Proc 9(7–8):975
Zheng QJ, Reddy RG (2004) J Mater Sci 39:141
Acknowledgements
We appreciate the financial supports of National Natural Science Foundation of China (50572076) and Ministry of Education of China (20040488001).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jin, S., Li, Y., Li, Y. et al. Modified directed melt nitridation of pure aluminum block using magnesium as an external dopant. J Mater Sci 42, 7311–7315 (2007). https://doi.org/10.1007/s10853-007-1578-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10853-007-1578-x