摘要
采用尿素溶液对一种低模量近?型钛合金(Ti-25Nb-3Zr-2Sn-3Mo,或TLM合金)进行不同温度的水热处理。采用SEM、XRD、XPS、压入法和接触角测试分析了TLM合金处理后的表面结构、化学成分、附着性和亲水性。在105和120℃水热处理后,合金表面形成了钛酸铵的纳米片薄膜;而150℃水热处理后形成了纳米颗粒薄膜,由锐钛矿TiO2和Nb2O5组成。随后的400℃退火热处理使铵盐分解和二氧化钛结晶。生成的氧化物薄膜具有良好的附着性。复合处理增强了TLM合金的亲水性,这有利于改善其生物相容性。
A low modulus near βtype titanium alloy （Ti-25Nb-3Zr-2Sn-3Mo, or TLM alloy） was subjected to hydrotherrnal treat- ments with a urea solution at different temperatures followed by heat treatment. The surface structure, the chemical composition, adhesion and hydrophilicity of the treated TLM alloy were investigated by SEM, XRD, XPS, Rockwell-C indentation test and con- tact angle measurement. The results show that nanosheet films of ammonium titanate can be formed at 105 and 120 ℃, while the nanoparticle film of anatase TiO2 containing Nb205 is formed at 150 ℃ on the alloy surface. The subsequent annealing heat treat- ment at 400 ℃ can decompose the ammonium salts and crystallize titania. The obtained oxide films have a good adhesion. The du- plex treatment has enhanced the hydrophilicity of the TLM alloy, and it would be good for its biocompatibility.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第2期291-295,共5页
Rare Metal Materials and Engineering
基金
Fundamental Research Fund for the Central Universities(xjj2011096)
Natural Science Foundation of China(50901058)
Opening Research Fund of State Key Laboratory of Porous Metal Materials(PMM-SKL-2-2012)
关键词
钛合金
生物材料
水热
TIO2
亲水性
titanium alloy
biomaterials
hydrothermal
TiO2
hydrophilicity
