000171128 001__ 171128
000171128 005__ 20181203022526.0
000171128 0247_ $$2doi$$a10.1016/j.wear.2011.05.010
000171128 02470 $$2ISI$$a000293322000011
000171128 037__ $$aARTICLE
000171128 245__ $$aFretting-corrosion behavior of beta titanium alloys in simulated synovial fluid
000171128 269__ $$a2011
000171128 260__ $$c2011
000171128 336__ $$aJournal Articles
000171128 520__ $$aFretting-corrosion is a material degradation process resulting from the combined action of a corrosive environment and small displacement fretting wear. In this work, the fretting-corrosion behavior of Ti-12.5Mo, Ti-13Nb-13Zr, and Ti-29Nb-13Ta-4.6Zr, beta titanium alloys which are candidate biomaterials for joint prostheses was studied in Hank's balanced salt solution. Ti-6Al-4Fe alpha + beta titanium alloy was also tested for comparison. The open circuit potential, anodic current and friction coefficient were measured in situ, while the microstructure and volume of the wear track were characterized after testing. Ti-13Nb-13Zr and Ti-29Nb-13Ta-4.6Zr exhibited the ability to regain their passive state during fretting, while Ti-6Al-4Fe exhibited large dissolution pits around the wear track indicative of a widespread depassivation activated by fretting. The ability of these beta alloys to recover their passive state during fretting was related to the mechanical properties of the superficial passive layers and the evolution of the contact pressure defined by the wear of the alloy. The effects of the addition of synovial constituents, namely bovine serum albumin, hyaluronic acid and dipalmitoyphosphatidycholine on the fretting-corrosion of Ti-12.5Mo alloy were also studied. The addition of synovial constituents induced a decrease of the friction coefficient, the amount of elastic accommodation of the displacement and the wear rate of the alloy. (C) 2011 Elsevier B.V. All rights reserved.
000171128 6531_ $$aBiomaterials
000171128 6531_ $$aDepassivation
000171128 6531_ $$aRepassivation
000171128 6531_ $$aCritical pressure
000171128 6531_ $$aSodium-Chloride Solution
000171128 6531_ $$aSulfuric-Acid
000171128 6531_ $$aImplant
000171128 6531_ $$aTi6Al4V
000171128 700__ $$aDiomidis, N.
000171128 700__ $$aMischler, S.
000171128 700__ $$aMore, N. S.
000171128 700__ $$aRoy, M.
000171128 700__ $$aPaul, S. N.
000171128 773__ $$j271$$q1093-1102$$tWear
000171128 909C0 $$0252369$$pSB$$xU10077
000171128 909CO $$ooai:infoscience.tind.io:171128$$pSB$$particle
000171128 917Z8 $$x105869
000171128 937__ $$aEPFL-ARTICLE-171128
000171128 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000171128 980__ $$aARTICLE