SLM成形义齿支架在模拟口腔环境下的耐腐蚀性能

doi:10.11896/cldb.19120154

材料导报

2021, Vol. 35

Issue (6): 6107-6113 https://doi.org/10.11896/cldb.19120154

金属与金属基复合材料

SLM成形义齿支架在模拟口腔环境下的耐腐蚀性能

冯庆晓¹, 李多生¹, 宋胜利², 叶寅¹, 王国波¹, 王明娣³

1 南昌航空大学材料科学与工程学院,南昌 330063
2 陆军工程大学机电工程学院,南京 210016
3 苏州大学机电工程学院,苏州 215137

Corrosion Resistance of SLM Denture Scaffold in Simulated Oral Environment

FENG Qingxiao¹, LI Duosheng¹, SONG Shengli², YE Yin¹, WANG Guobo¹, WANG Mingdi³

1 School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
2 College of Mechanical and Electrical Engineering, Army Engineering University of PLA, Nanjing 210016, China
3 School of Mechanical and Electrical Engineering, Soochow University, Suzhou 215137, China

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摘要利用选区激光熔化(Selective laser melting,SLM)技术打印TC4合金成形义齿支架,研究在人工唾液(模拟口腔环境)中不同腐蚀时间下其耐腐蚀性能的变化规律,对其显微组织进行分析,结合电化学测试和腐蚀后形貌对耐腐蚀性能的趋势进行探究,并与铸造TC4合金进行对比。结果表明:随着腐蚀时间的延长,SLM样件的耐腐蚀性呈现逐渐增强的趋势,而铸造样件的耐腐蚀性先增强后降低。腐蚀后的SLM合金表面形成钝化膜,其成分以TiO₂、Al₂O₃为主,样件表面腐蚀形态以蚀坑为主,而铸造样件表面缺陷多于SLM样件。SLM打印TC4的物相主要为密排六方结构的α相与生长方向呈±45°的α'马氏体相,其针状α'马氏体晶粒尺寸为(2±0.5) μm,并没有明显β相出现;铸造样件的物相为α+β相。SLM成形TC4的耐腐蚀性能与显微组织中复杂的α'马氏体相转变有关。

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	冯庆晓
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关键词: SLM 义齿支架人工唾液针状α'马氏体

Abstract: Selective laser melting (SLM) technology was applied to print TC4 alloy denture scaffold. The corrosion resistance of TC4 alloy was studied in artificial saliva (simulated oral environment) under different corrosion times. The electrochemical test curves and microstructure were analyzed and compared to the cast TC4 alloy. The results show that the corrosion resistance of SLM samples gradually increases with the increase of corrosion time, while that of cast samples gradually decreases, but the corrosion resistance of SLM samples is slightly worse than that of cast samples at the same corrosion time. After corrosion, the surface of SLM alloy forms passivated film, which is mainly composed of TiO₂ and Al₂O₃. The phase of TC4 printed by SLM is mainly α and α' martensite phase with closely arranged hexagonal structure, but no obvious β phase. The casting samples is composed of α and β phase. The corrosion resistance of TC4 manufactured by SLM is related to the complex α' martensite phase transformation in the microstructrue.

Key words: SLM denture stent artificial saliva acicular α' martensite

出版日期: 2021-03-25 发布日期: 2021-03-23

ZTFLH:

TG178

基金资助: 国家自然科学基金项目(51562027); 江西省重点研发计划重点项目 (20201BBE51001) ;江西省省级优势科技创新团队项目(20181BCB24007);江西省自然科学基金项目(20171BAB216003)

通讯作者: duosheng.li@nchu.edu.cn;wangmingdi@suda.edu.cn

作者简介: 冯庆晓,出生于1995年,南昌航空大学材料科学与工程学院硕士研究生,研究方向为选区激光熔化钛合金数值模拟及钛合金的耐蚀性能。
李多生,出生于1972年,教授,博士,硕士研究生导师。江西省高校中青年骨干教师,澳大利亚国立大学访问学者。2015年度入选合肥“百人计划”、“南昌市海外留学人才”,江苏省优秀博士学位论文获得者等。主持和参加国家、省部级科研项目20余项,在国内外期刊发表SCI或EI检索论文50余篇,申请发明专利20余项,授权发明专利10余项,以副主编身份出版教材一部。研究方向:3D制造,新型碳纳米材料,腐蚀与防护,金属基复合材料,数值模拟。
王明娣,出生于1975年,教授,博士,博士生导师。多伦多大学访问学者,ADM、AME等SCI国际著名期刊的审稿人。主持国家自然科学基金2项,江苏省自然科学基金1项、苏州市基础研究计划-工业部分1项、江苏省博士后基金1项,参与各类基金项目10余项;发表SCI或EI检索论文40余篇。研究方向:激光超高速熔覆、激光3D打印、激光清洗、激光连接、机构学创新设计。

引用本文:

冯庆晓, 李多生, 宋胜利, 叶寅, 王国波, 王明娣. SLM成形义齿支架在模拟口腔环境下的耐腐蚀性能[J]. 材料导报, 2021, 35(6): 6107-6113.
FENG Qingxiao, LI Duosheng, SONG Shengli, YE Yin, WANG Guobo, WANG Mingdi. Corrosion Resistance of SLM Denture Scaffold in Simulated Oral Environment. Materials Reports, 2021, 35(6): 6107-6113.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.19120154 或 http://www.mater-rep.com/CN/Y2021/V35/I6/6107

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