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Nd2O3含量对宽带激光熔覆生物活性稀土梯度涂层性能的影响

Effect of Different Nd2O3 Contents on Performances of Rare Earth Active Bioceramic Gradient Coating Produced by Wide-Band Laser Cladding

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摘要

为了减少激光熔覆过程中基材与生物陶瓷涂层之间的热应力,提高涂层与基材的结合强度,设计了一种稀土活性生物梯度陶瓷涂层,采用宽带激光熔覆技术,在TC4合金上制备了含HA+β-TCP稀土活性梯度生物陶瓷复合涂层。利用扫描电镜(SEM)、X射线衍射(XRD)、模拟体液(SBF)以及电化学分析仪等手段对涂层组织结构、生物活性及耐腐蚀性进行了研究。结果表明,生物活性稀土梯度涂层分为基材、合金化层以及生物陶瓷层3个层次,且各梯度层之间均为良好的化学冶金结合;稀土氧化物Nd2O3在宽带激光熔覆生物陶瓷的过程中具有催化合成HA+β-TCP的作用,且当Nd2O3质量分数为0.6%时,催化合成HA+β-TCP的量最多;当Nd2O3质量分数为0.4%~0.6%时,涂层的耐腐蚀性最好且涂层表面沉积的磷灰石相的量最多,具有最佳的生物活性。

Abstract

To decrease the thermal stress and raise the bonding strength between substrate and bioceramic coating during laser cladding, a rare earth active bioceramic gradient coating is designed. The rare earth active gradient bioceramic coating with HA and β-TCP on TC4 allloy is prepared by using wide-band laser cladding technique. The microstructure, bioactivity and corrosion resistance of bioceramic coating are analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD), simulated body fluid (SBF), and electrochemical analyzer. The experimental results show that the bioactive rare earth gradient coating which has excellent chemical metallurgy bonding at the interface consists of substrate, alloying layer and bioceramic coating. Nd2O3 plays an important role in synthesizing HA and β-TCP during wide-band laser cladding. When the mass fraction of Nd2O3 is up to 0.6%, the amount of HA+β-TCP catalyzed during wide-band laser cladding becomes the largest. When the mass fraction of Nd2O3 is 0.4%~0.6%, the corrosion resistance of bioceramic coating is the best one, and the amount of HA deposited on coating becomes the biggest, showing the best bioactivity.

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补充资料

中图分类号:TG174;TG156.99;TB39;TN249

DOI:10.3788/cjl201138.0506003

所属栏目:材料与薄膜

基金项目:国家自然科学基金(50961003)、贵州大学研究生创新基金(省研理工2010001)和贵州省科技创新人才团队建设项目[科合人才团(2010)4004]资助课题)

收稿日期:2010-12-31

修改稿日期:2011-03-13

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作者单位    点击查看

汪震:贵州大学材料与冶金学院, 贵州 贵阳 550003
刘其斌:贵州大学材料与冶金学院, 贵州 贵阳 550003贵州省材料结构与强度重点实验室, 贵州 贵阳 550003
肖明:贵州大学材料与冶金学院, 贵州 贵阳 550003
杨邦成:四川大学生物材料工程研究中心, 四川 成都 610064

联系人作者:汪震(wz19811109@163.com)

备注:汪震(1981—),男,硕士研究生,主要从事生物医学材料方面的研究。

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引用该论文

Wang Zhen,Liu Qibin,Xiao Ming,Yang Bangcheng. Effect of Different Nd2O3 Contents on Performances of Rare Earth Active Bioceramic Gradient Coating Produced by Wide-Band Laser Cladding[J]. Chinese Journal of Lasers, 2011, 38(5): 0506003

汪震,刘其斌,肖明,杨邦成. Nd2O3含量对宽带激光熔覆生物活性稀土梯度涂层性能的影响[J]. 中国激光, 2011, 38(5): 0506003

被引情况

【1】王永福,王毅,汪震. Nd2O3含量对宽带激光熔覆生物活性稀土梯度涂层生物相容性的影响. 应用激光, 2012, 32(4): 323-326

【2】李宾,田兴强,汪震. 人成骨细胞在宽带激光熔覆Nd2O3稀土涂层表面的生物活性. 应用激光, 2013, 33(6): 628-632

【3】田兴强,汪震. 激光制备+电极化处理梯度生物陶瓷涂层的生物活性. 应用激光, 2016, 36(2): 151-155

【4】王彦芳,李豪,孙旭,宋增金,李娟,石志强. 宽带激光熔覆铁基非晶涂层的微观组织及形成机制. 中国激光, 2018, 45(3): 302006--1

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