ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
NiTi alloys with equiatomic composition of NiTi have the highest technologicalinterest for its potencial application in differents areas such as biomedical, naval, aerospace,nuclear, automobilist , robotic,etc. In this work , it was used a 50Ni50Ti at % powder mixture,comercially pure, prepared by mechanical alloying in a Attritor with the following conditions:the milling speed and the ball charge were 1500 rpm and 10:1 respectively. The milling timewas 2,4,8 and 16h, under an argon atmosphere at room temperature. After milling it wasdetermined the particle size distribution, the phases by X-ray diffractions (XRD) and thepowder morphology by scanning electron microscopy (SEM). The milling promotesdissolution of Titanium in Nickel and continuous amorphization by increasing the millingtime. After 16h milling the alloy was almost amorphous. The powders after milling werecompacted and heat treated at high temperature and microstructural evolution wascharacterized. In the heat treated samples were detected different phases showingheterogeneity in the alloy. The detected phases were Ni3Ti, NiTi, Ni2Ti and Ni2Ti4O.Contamination by milling was detected in the powder after milling and in the heat treatedsamples
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.53.pdf
Permalink