Bin Yang, Jishan Zhang, Xianjin Duan, and Shuangchun Hu, Effect of Ti/B Additions on the Formation of Al3 Ti of in situ TiB2/Al Composites, J. Univ. Sci. Technol. Beijing, 6(1999), No. 4, pp. 285-288.
Cite this article as:
Bin Yang, Jishan Zhang, Xianjin Duan, and Shuangchun Hu, Effect of Ti/B Additions on the Formation of Al3 Ti of in situ TiB2/Al Composites, J. Univ. Sci. Technol. Beijing, 6(1999), No. 4, pp. 285-288.
Bin Yang, Jishan Zhang, Xianjin Duan, and Shuangchun Hu, Effect of Ti/B Additions on the Formation of Al3 Ti of in situ TiB2/Al Composites, J. Univ. Sci. Technol. Beijing, 6(1999), No. 4, pp. 285-288.
Citation:
Bin Yang, Jishan Zhang, Xianjin Duan, and Shuangchun Hu, Effect of Ti/B Additions on the Formation of Al3 Ti of in situ TiB2/Al Composites, J. Univ. Sci. Technol. Beijing, 6(1999), No. 4, pp. 285-288.
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
中文摘要
A novel technique for fabricating TiB2/Al composites in molten aluminum was introduced. The formation mechanism of brittle Al3Ti particulates up to 30 m in size produced in the composites was studied and a method of eliminating them was proposed. The results show that (1) the brittle Al3Ti particulates are always present in the composites when the molar ratio of Ti to B nTi:nB is 1:2; and (2) the formation of the brittle Al3Ti phase can be avoided entirely from the final product by using a proper nTi:nB of l:4 in the Ti-B-Al preforms.In the former case, the tensile elongation of the composite is only 4%, much lower than the value of pure aluminum (20%). In the later case, the tensile elongation of this composite is 10%, higher than the value of the composite with a lot of Al3Ti (4%), whereas the ultimate tensile strength of the former is nearly that of the later.
A novel technique for fabricating TiB2/Al composites in molten aluminum was introduced. The formation mechanism of brittle Al3Ti particulates up to 30 m in size produced in the composites was studied and a method of eliminating them was proposed. The results show that (1) the brittle Al3Ti particulates are always present in the composites when the molar ratio of Ti to B nTi:nB is 1:2; and (2) the formation of the brittle Al3Ti phase can be avoided entirely from the final product by using a proper nTi:nB of l:4 in the Ti-B-Al preforms.In the former case, the tensile elongation of the composite is only 4%, much lower than the value of pure aluminum (20%). In the later case, the tensile elongation of this composite is 10%, higher than the value of the composite with a lot of Al3Ti (4%), whereas the ultimate tensile strength of the former is nearly that of the later.
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