Biocorrosion study of titanium-nickel alloys.
The present study provides results of the corrosion behaviour in Hank's physiological solution and some other properties of three Ti-Ni alloys with 18, 25 and 28.4 wt% Ni, respectively. Results indicate that alpha-titanium and Ti2Ni were the two major phases in all three Ti-Ni alloys. The relative amount of the Ti2Ni phase increased with additional Ni content. Hardness of the Ti-Ni alloys also increased with added nickel content, ranging from 310 to 390 VHN, similar to the hardness of enamel. Melting temperatures of the Ti-Ni alloys were all lower than that of pure titanium by least 600 degrees C. The three Ti-Ni alloys behaved almost identically when potentiodynamically polarized in Hank's solution at 37 degrees C. The critical anodic current densities of the alloys were nearly 30 microA/cm2 and the breakdown potentials were all above 1100 mV (SCE).
Chern Lin
J H
JH
Department of Materials Science and Engineering, National Cheng-Kung University Tainan, China.
Lo
S J
SJ
Ju
C P
CP
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003343:Corrosion; D003722:Dental Alloys / Q000032:analysis / Q000737:chemistry*; D003743:Dental Enamel / Q000033:anatomy & histology; D004563:Electrochemistry; D006244:Hardness; D006358:Hot Temperature; D006801:Humans; D007552:Isotonic Solutions / Q000737:chemistry; D008422:Materials Testing; D009532:Nickel / Q000032:analysis / Q000737:chemistry*; D011199:Potentiometry; D014025:Titanium / Q000032:analysis / Q000737:chemistry*
D003722:Dental Alloys; C072670:Hanks Balanced Salt Solution; D007552:Isotonic Solutions; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium