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

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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

Published: 23 March 2021

CLC number:

TG178

Fund:National Natural Science Foundation of China (51562027), Key Project of Jiangxi Province Key R&D Plan (20201BBE51001), Advantage Technology Innovation Team of Jiangxi Province (20181BCB24007), Natural Science Foundation of Jiangxi Province (20171BAB216003).

About author:: Qingxiao Feng, born in 1995, is studying for a master's degree in the School of Materials Science and Engineering, Nanchang Hangkong University. The research direction is numerical simulation of selective laser melting of titanium alloy, corrosion resistance of titanium alloys.
Duosheng Li, born in 1972, professor, Ph.D., master tutor. Doctor of Nanjing University of Aeronautics and Astronautics, master tutor of Nanchang Hangkong University. Young and middle-aged backbone teachers in universities of Jiangxi Province, visiting scholar of Australian National University. In 2015, he was selected into the “Hundred Talents Plan” of Hefei, “Overseas Talents of Nanchang”, and the winner of excellent doctoral dissertation of Jiangsu Province. He has presided over and participated in more than 20 national, provincial and ministerial scientific research projects, published more than 50 SCI or EI indexed papers in domestic and foreign journals, applied for more than 20 invention patents, authorized more than 10 invention patents, and published one teaching material as deputy chief editor. Research direction: 3D manufacturing, new carbon nanomaterials, corrosion and protection, metal matrix composites, numerical simulation.
Mingdi Wang, born in 1975, professor, Ph.D., and doctoral supervisor. Visiting scholar at the University of Toronto, reviewer of SCI internationally renowned journals such as ADM and AME. Presided over 2 National Natural Science Foundation of China, 1 Jiangsu Natural Science Foundation, 1 Suzhou Basic Research Project-Industrial Part, 1 Jiangsu Postdoctoral Fund, participated in more than 10 various fund projects; published SCI or EI retrieval papers 40 More articles. Research direction: laser ultra-high-speed cladding, laser 3D printing, laser cleaning, laser connection, innovative design of mechanism.

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	FENG Qingxiao
	LI Duosheng
	SONG Shengli
	YE Yin
	WANG Guobo
	WANG Mingdi

Cite this article:

FENG Qingxiao,LI Duosheng,SONG Shengli, et al. Corrosion Resistance of SLM Denture Scaffold in Simulated Oral Environment[J]. Materials Reports, 2021, 35(6): 6107-6113.

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

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