Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/92726
Title: In-situ formation of TiB2 reinforced aluminium via mechanical alloying
Authors: Lu, L. 
Lai, M.O. 
Niu, X.P.
Ho, H.N.
Issue Date: Aug-1998
Source: Lu, L.,Lai, M.O.,Niu, X.P.,Ho, H.N. (1998-08). In-situ formation of TiB2 reinforced aluminium via mechanical alloying. Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques 89 (8) : 567-572. ScholarBank@NUS Repository.
Abstract: This paper investigates the possibility of in-situ formation of TiB2 ceramic particulates via the process of mechanical alloying of elemental Ti and B powders in a system diluted with Al. Elemental Al powder was mechanically milled together with Ti and B powders in a high energy planetary ball mill. 30 stainless steel balls with diameter of 15 mm were employed. The ball to powder weight ratio was 20:1. X-ray spectra revealed the evolution of structural changes of the alloyed powder particles. No evidence of formation of TiB2 was manifested when the milling duration was shorter than 30 h. A TiB2-like structure could be detected only after 40 hour of milling. Because of broadening and weakening of the X-ray diffraction (XRD) peaks corresponding to Al and TiB2 structures as a result of refinement of crystalline size and the presence of large structural distortion, only very weak and vague TiB2 XRD peaks could be detected. Clear evidence of formation of TiB2 was, however, observed when the mechanically alloyed powder was annealed. Therefore, the results of the present investigation clearly indicate that formation of in-situ TiB2 particulates within Al is possible although a longer milling duration is required. Mechanical testing shows that both the 0.2% yield and the ultimate tensile stresses are increased with MA duration and sintering duration.
Source Title: Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
URI: http://scholarbank.nus.edu.sg/handle/10635/92726
ISSN: 00443093
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

49
checked on Jan 13, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.