In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 32, No. 12 ( 2017-06-28), p. 2352-2360
Abstract:
Melt-SHS (self-propagating high-temperature synthesis), based on the SHS process and oxide reaction method, was used for preparation of TiB 2 /Al composites. The mass ratio of two reactants, Ti powder/TiO 2 , in initial powder mixture was varied from 0:1 to 1:0. The results showed that the 5 wt% TiB 2 /Al composites could be successfully produced by a reaction of aluminum powder, TiO 2 , and B 2 O 3 in Al melt at 950 °C, while the reaction rate was slow. The addition of titanium powder helps to reduce the content of Al 2 O 3 and destroy the coating structure of Al 2 O 3 covered TiB 2 particles, which leads to the acceleration of reaction process and improvement of particle concentration. A significant improvement was that TiB 2 particles were dispersively distributed when the mass ratio of Ti powder/TiO 2 was 2:3. As a result, the 5 wt% TiB 2 /Al composites fabricated by melt-SHS process with modified reactants ratio showed excellent tensile properties with the ultimate tensile strength as high as 114.24 MPa. Besides, the composite also showed superior ductility.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/jmr.2017.184
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2017
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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