Study on the role of stearic acid and ethylene-bis-stearamide on the mechanical alloying of a biomedical titanium based alloy

Nouri, Alireza, Hodgson, Peter D. and Wen, Cui'e 2010, Study on the role of stearic acid and ethylene-bis-stearamide on the mechanical alloying of a biomedical titanium based alloy, Metallurgical and materials transactions A – physical metallurgy and materials science, vol. 41, no. 6, pp. 1409-1420, doi: 10.1007/s11661-010-0207-5.

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Title Study on the role of stearic acid and ethylene-bis-stearamide on the mechanical alloying of a biomedical titanium based alloy
Author(s) Nouri, Alireza
Hodgson, Peter D.
Wen, Cui'e
Journal name Metallurgical and materials transactions A – physical metallurgy and materials science
Volume number 41
Issue number 6
Start page 1409
End page 1420
Total pages 12
Publisher Springer New York LLC
Place of publication New York, N. Y.
Publication date 2010-04-17
ISSN 1073-5623
1543-1940
Summary The present study examines the influence of different contents and types of process control agent (PCA), i.e., stearic acid (SA) and ethylene-bis-stearamide (EBS), on the microstructural evolution and characteristics of Ti-16Sn-4Nb (wt pct) alloy powders and bulk samples. The characterization of the powders and bulk samples was carried out by using chemical analysis, optical microscopy, scanning electron microscopy (SEM) combined with energy-dispersive spectrometry (EDS), and X-ray diffractometry. Results indicated that the powder recovered from the ball milling containers increased with increasing amounts of SA and EBS. Furthermore, adding more SA or EBS to the powder mixture resulted in a considerably smaller particle size, with a flaky-shaped morphology for the given ball milling time. Also, a slightly higher effectiveness was found for EBS when compared to SA. Meanwhile, the addition of both SA and EBS led to a delay in the alloy formation during mechanical alloying (MA) and caused contamination of the material with mainly carbon (C) and oxygen (O). An optimum amount of 1 wt pct PCA led to a good balance between cold welding and fracturing, and thus favored the formation of the titanium alloy. The microstructural observation of the bulk alloy showed a homogeneous distribution of fine Nb-rich ß-phase colonies within the α-Ti matrix with the addition of PCA less than 1 wt pct.
Language eng
DOI 10.1007/s11661-010-0207-5
Field of Research 090301 Biomaterials
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2010
Copyright notice ©2010, The Minerals, Metals & Materials Society and ASM International
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030478

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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