钙磷浓度变化对钛合金微弧氧化涂层微观力学性能的影响  

Effect of the change of Ca/P concentration on the mechanical properties of Ti-Alloy micro-arc oxidation coating

作　　者：王焱[1] 唐斌[2] 宁成云[3] 杨斯琴[1] 廖沛熙[1] 

机构地区：[1]中山大学光华口腔医学院附属口腔医院口腔医学研究所,广州510055 [2]香港大学机械工程系 [3]华南理工大学材料科学与工程学院

出　　处：《中华口腔医学研究杂志（电子版）》2011年第2期16-19,共4页Chinese Journal of Stomatological Research(Electronic Edition)

基　　金：广东省自然科学基金博士启动项目(8451008901000621);教育部博士点基金新教师项目(200805581154)

摘　　要：目的研究微弧氧化(MAO)电解液中钙磷浓度的变化对所制备涂层微观力学性能的影响。方法制作直径10mm、厚1mm的圆盘形Ti-6Al-4V合金试件32个,随机分4组,在4种含不同配比的乙酸钙和β-甘油磷酸二钠盐的电解液中制备MAO涂层。4种电解液中β-甘油磷酸二钠盐浓度均固定为0.02mol/L,乙酸钙浓度从0.05～0.3mol/L逐级递增。通过X线能谱分析检测试件表面MAO涂层的钙磷比(Ca/P),纳米压痕试验测量涂层的微弹性模量及微硬度。结果电解液中乙酸钙浓度从0.05～0.3mol/L逐级增加时,制备出的MAO涂层Ca/P也相应从0.52±0.02、1.23±0.05、1.75±0.10增加到2.44±0.05,微弹性模量分别为(56.11±8.22)、(48.46±9.74)、(32.07±7.07)和(28.19±6.94)GPa,微硬度分别为(3.13±0.78)、(2.56±0.85)、(1.49±0.68)和(0.68±0.27)GPa。结论电解液中钙磷浓度变化对MAO涂层的微观力学性能有显著影响。微弹性模量及微硬度随涂层Ca/P增加而减小。Objective To explore the effect of the change of Ca and P concentration in the electrolyte on the micro-mechanical properties of the titanium alloy coating formed by micro-arc oxidation （MAO） technique. Methods Thirty two disc-shaped Ti-6Al-4V specimens （10 mm in diameter and 1 mm in thickness） were equally divided into 4 groups. The surfaces were treated by MAO technique in electrolytic solution containing calcium acetate （CA） and β-glycerol phosphate disodium salt pentahydrate （β-GP）. The concentration of β-GP was fixed at 0.02 mol/L, while the concentrations of CA were set at 0.05-0.3 mol/L respectively for the 4 testing groups. The Ca/P ratios of the surface MAO coatings were detected by energy dispersive X-ray analysis （EDX）. The micro hardnesses and elastic moduli were measured by a nano-indentation tester. Results When the CA concentration was increased from 0.05 to 0.3 mol/L in the electrolyte, the Ca/P ratios of the MAO coating increased accordingly from 0.52 ± 0.02, 1.23 ± 0.05, 1.75 ±0.10 to 2.44 ± 0.05. The elastic moduli and the hardnesses of the 4 groups of MAO coating were （56.11 ± 8.22）GPa, （48.46 ± 9.74）GPa, （32.07 ± 7.07）GPa, （28.19 ± 6.94）GPa and （3.13 ± 0.78）GPa, （2.56 ± 0.85）GPa, （1.49 ± 0.68）GPa, （0.68 ± 0.27）GPa respectively. Conclusions The Ca/P concentration of the electrolyte has a significant effect on the micro-mechanical properties of the MAO coating of titanium alloy. The micro-elastic modulus and micro-hardness of the MAO coating decrease with the Ca/P ratio.

关 键 词：钛合金 涂层 机械性能 纳米压痕 微弧氧化 

分 类 号：R783[医药卫生—口腔医学]