Jo Chae-Ik, Jeong Yong-Hoon, Brantley William A, Choe Han-Cheol
J Nanosci Nanotechnol. 2014 Oct;14(10):7581-4. doi: 10.1166/jnn.2014.9576.
Hydroxyapatite precipitation on nanotube surfaces of Ti-35Ta-xNb alloys was investigated using electrochemical methods. The alloys were prepared by arc-melting, heat treated at 1050 degrees C for 12 h in an Ar atmosphere, and quenched in 0 degrees C water. Nanotubes were created on the Ti-35Ta-xNb alloys in a 1 M H3PO4 + 1.2 wt.% NaF electrolyte at room temperature. Hydroxyapatite precipitation was carried out in a 0.03 M Ca(NO3)2 x 4H2O + 0.018 M NH4H2PO4 solution at 80 ± 1 degrees C, using 10 deposition cycles. Information about morphology and composition was obtained by FE-SEM and EDS. The microstructure of the Ti-35Ta-xNb alloys was transformed from α phase to βphase as the Nb content increased. The HA precipitates had a plate-like morphology on bulk Ti-35Ta-xNb alloys and a flower-like morphology on nanotubular Ti-35Ta-xNb alloys.
采用电化学方法研究了Ti-35Ta-xNb合金纳米管表面的羟基磷灰石沉淀。合金通过电弧熔炼制备，在氩气气氛中于1050℃热处理12小时，然后在0℃水中淬火。在室温下，在1M H3PO4 + 1.2 wt.% NaF电解液中在Ti-35Ta-xNb合金上制备纳米管。在80±1℃的0.03M Ca(NO3)2·4H2O + 0.018M NH4H2PO4溶液中进行10次沉积循环的羟基磷灰石沉淀。通过场发射扫描电子显微镜（FE-SEM）和能谱仪（EDS）获得有关形态和成分的信息。随着Nb含量的增加，Ti-35Ta-xNb合金的微观结构从α相转变为β相。羟基磷灰石沉淀在块状Ti-35Ta-xNb合金上呈板状形态，在纳米管Ti-35Ta-xNb合金上呈花状形态。
