(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；
2. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 運(yùn)用一種改進(jìn)的方法制作多元擴(kuò)散節(jié)Ti-Zr-Nb，并在1173 K溫度下退火1800 h，水淬至室溫。結(jié)合納米壓痕儀(nano-indentation)與電子探針(EPMA)，測(cè)定擴(kuò)散節(jié)上每一點(diǎn)的成分、硬度和彈性模量，建立Ti-Zr-Nb體系成分-硬度-彈性模量數(shù)據(jù)庫。結(jié)果表明，硬度與彈性模量強(qiáng)烈地依賴于Zr和Nb的成分變化，Ti-41Zr-10Nb具有較小的彈性模量，且硬度較大，有望在此基礎(chǔ)上開發(fā)新型生物醫(yī)用鈦合金。這種高效的擴(kuò)散多元節(jié)組合材料設(shè)計(jì)方法可以加快生物醫(yī)用鈦合金的研制、開發(fā)與應(yīng)用的速度。
關(guān)鍵字: 生物鈦合金；組合材料設(shè)計(jì)方法；擴(kuò)散節(jié)；納米壓痕
（1. School of Material science and Engineering, Central South University, Changsha 410083, China;
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:Ti-Zr-Nb system with diffusion multiple was manufactured, then annealed at 1273 K for 1800 h, and water quenched to room temperature. Combining nano-indentation and electron probe micro-analyze (EPMA), the elastic modulus, hardness as well as composition at each point of the diffusion multiple were determined. Based on the experimental data, the composition-hardness-elastic modulus database of the Ti-Zr-Nb alloys is obtained. The results show that the elastic modulus and hardness depend strongly on Zr and Nb content. Ti-41Zr-10Nb has a relative lower elastic modulus, and a relative larger hardness, which is promising candidates as metallic biomaterials for application. The high-efficiency combinatorial approach has demonstrated to be an effective tool in accelerating the metallic biomaterials research and discovery.
Key words: biomedical titanium alloy; combinatorial approach; diffusion multiple; nano-indentation
