摘要
作为生物医用材料,TC4钛合金在骨组织再修复领域中临床使用量很大,中国每年的消耗量约为百万件以上。但TC4钛合金耐磨性低、生物活性差等问题严重制约其工程应用领域的扩展。为此,采用微弧氧化/水热合成复合技术在TC4表面制备微弧氧化/水热复合涂层,研究水热合成液中La(NO_(3))_(3)掺杂量对TC4钛合金微弧氧化/水热涂层的相组成、微观形貌、显微硬度、耐磨性等参数的影响作用。利用XRD、SEM、显微硬度计、摩擦磨损试验机等手段对TC4钛合金微弧氧化/水热涂层进行表征。研究结果表明:TC4钛合金微弧氧化/水热涂层相组成主要由锐钛矿型TiO_(2)和羟基磷灰石组成。经过水热处理后合成液中La^(3+)进入到复合涂层中,参与涂层反应。随着La(NO_(3))3掺杂量增加,获得的复合涂层中羟基磷灰石相含量先增加后降低。当La(NO_(3))_(3)掺杂量超过24 mmol/L时,涂层表面变得更为光滑。TC4钛合金微弧氧化/水热涂层的显微硬度先降低后增加,且其摩擦系数先增大后减小。当La(NO_(3))_(3)掺杂量达到24 mmol/L时,涂层的显微硬度达到最小值,约为271.8 HV9.8 N;涂层摩擦系数达到最大值,约为0.8~0.9。
As a biomedical material,TC4 titanium alloy is widely used in the field of bone tissue repair in clinical practice,with annual consumption of about one million pieces in China.However,the properties of TC4 titanium alloy as low wear resistance and poor biological activity seriously restricted its expansion in engineering application.Therefore,a micro-arc oxidation/hydrothermal coating on surface of TC4 was fabricated by utilizing the micro-arc oxidation/hydrothermal synthetic composite technology,and the effects of La(NO_(3))_(3) doping amount in the hydrothermal synthesis solution on the phase composition,micro morphology,microhardness,wear resistance and other parameters of the micro-arc oxidation/hydrothermal coating on TC4 titanium alloy were surveyed.Moreover,the micro-arc oxidation/hydrothermal coating on TC4 titanium alloy was characterized by XRD,SEM,microhardness tester and friction and wear testing machine.Results showed that the micro-arc oxidation/hydrothermal coating on TC4 titanium alloy was mainly composed of anatase TiO_(2) and hydroxyapatite.After hydrothermal treatment,La^(3+)in the synthetic solution entered the composite coating and participated in the coating reaction.With the increase of La(NO_(3))_(3) doping amount,the content of hydroxyapatite phase in the composite coating increased first and then decreased.When the doping amount of La(NO_(3))_(3) exceeded 24 mmol/L,the coating surface became smoother.In addition,the microhardness of micro-arc oxidation/hydrothermal composite coating on TC4 titanium alloy decreased first and then increased,and the friction coefficient increased first and then decreased.As the doping amount of La(NO_(3))_(3) reached 24 mmol/L,microhardness of the composite coating on TC4 titanium alloy acquired the minimum value,and it was about(271.8±3.1)HV9.8 N,the friction coefficient of the composite coating obtained the maximum value,and it was about 0.8~0.9.
作者
张云龙
牛楚涵
董鑫焱
张宇民
李启荣
李成海
张瑞霞
张唯一
ZHANG Yunlong;NIU Chuhan;DONG Xinyan;ZHANG Yumin;LI Qirong;LI Chenghai;ZHANG Ruixia;ZHANG Weiyi(Collage of Materials Science and Engineering,Jiamusi University,Jiamusi 154007,China;Institute of Composite Materials and Structures,College of Aerospace Engineering,Harbin Institute of Technology,Harbin 150001,China)
出处
《材料保护》
CAS
CSCD
2023年第7期10-16,共7页
Materials Protection
基金
黑龙江省教育厅基础科研业务费项目(2021-KYYWF-0557)资助。
关键词
钛合金
微弧氧化/水热复合涂层
羟基磷灰石
显微结构
耐磨性
titanium alloy
micro-arc oxidation/hydrothermal composite coating
hydroxyapatite
microstructure
wear resistance
