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材料导报  2022, Vol. 36 Issue (21): 21050088-5    https://doi.org/10.11896/cldb.21050088
  金属与金属基复合材料 |
粉末冶金Ti-xNb-5Sn骨科合金的摩擦学行为
颉芳霞1,2,*, 杨豪1, 黄家兵1, 何雪明1,2, 俞经虎1,2
1 江南大学机械工程学院,江苏 无锡 214122
2 江苏省食品先进制造技术与装备重点实验室,江苏 无锡 214122
Tribological Behavior of Ti-xNb-5Sn Orthopedic Alloys Prepared by Powder Metallurgy
XIE Fangxia1,2,*, YANG Hao1, HUANG Jiabing1, HE Xueming1,2, YU Jinghu1,2
1 School of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
2 Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi 214122, Jiangsu, China
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摘要 本工作采用粉末冶金方法制备了Ti-xNb-5Sn(x=13%、16%、18%、20 %,质量分数)合金,研究了Nb含量对其微观组织和摩擦学行为的影响规律。结果表明:粉末冶金法制备的Ti-xNb-5Sn合金是典型的α+β型钛合金,α相随着Nb含量的增加逐渐减少,Nb含量为20%时β相的衍射峰成为主峰。合金的硬度和弹性模量随着Nb含量的增加而下降,分别在271HV~319HV和68~73 GPa之间变化。合金的摩擦系数随着Nb含量增多而提高,Ti-13Nb-5Sn合金的摩擦系数最小(0.41),Ti-20Nb-5Sn合金的摩擦系数最大(0.48)。合金的磨损率为1.36×10-3~1.58×10-3 mm3/(m·N)。随着Nb含量增多,合金的磨痕深度增加,分层现象逐渐加剧,并且有微裂纹出现。Ti-13Nb-5Sn合金的磨损机制为磨粒磨损,Ti-16Nb-5Sn合金和Ti-18Nb-5Sn合金以磨粒磨损为主、表面疲劳磨损为辅,而Ti-20Nb-5Sn合金以表面疲劳磨损为主。本研究证实Nb是一种β稳定剂,加入适量Nb可以降低合金的弹性模量,同时使其具有良好的耐磨性。粉末冶金制备的Ti-xNb-5Sn合金是一种具有发展潜力的骨科修复材料。
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颉芳霞
杨豪
黄家兵
何雪明
俞经虎
关键词:  Ti-Nb-Sn合金  粉末冶金  微观组织  摩擦学行为    
Abstract: In this work, Ti-xNb-5Sn (x=13%, 16%, 18%, 20%,mass fraction) alloys were prepared by powder metallurgy, and the effects of Nb content on the microstructure and tribological behavior of the alloys were studied. The results showed that the Ti-xNb-5Sn alloys were a typical α+β two-phase microstructure. The α phase decreased gradually with the increasing Nb content. When Nb content reached 20wt%, the β phase became the main peak. The hardness and elastic modulus decreased with the increase of Nb content in the ranges of 271HV—319HV and 68—73 GPa, respectively. The minimum friction coefficient of Ti-13Nb-5Sn was 0.41, and Ti-20Nb-5Sn increased to 0.48. The wear rate changed in the range of 1.36×10-3—1.58×10-3 mm3/(m·N). With the increase of Nb content, the grinding cracks deepened, delamination phenomenon intensified gradually, and microcracks generated. The Ti-13Nb-5Sn was dominated by abrasive wear. The wear mechanism of Ti-16Nb-5Sn and Ti-18Nb-5Sn changed to abrasive wear together with surface fatigue wear, while the Ti-20Nb-5Sn was surface fatigue wear predominately. This study confirms that Nb is a β-stabilizer. An appropriate amount of Nb can reduce the elastic modulus, and achieve good wear resistance. Ti-xNb-5Sn alloy prepared by molding-sintering is an attractive candidate for orthopedic materials.
Key words:  Ti-Nb-Sn alloy    powder metallurgy    microstructure    tribological behavior
出版日期:  2022-11-10      发布日期:  2022-11-03
ZTFLH:  TF125  
基金资助: 国家自然科学基金(51501073;51975251);江苏省自然科学基金(BK20140162)
通讯作者:  * xiefangxia@aliyun.com   
作者简介:  颉芳霞,江南大学机械工程学院副教授、硕士研究生导师。2013年6月在北京科技大学获得材料科学与工程专业博士学位。主要研究方向为新型生物钛基材料、金属增材制造技术/3D打印技术以及先进粉末冶金成形技术。先后主持国家自然科学基金、江苏省自然科学基金和中央专项基础科研项目,并参与多项国家级、省部级及企业项目。在国内外权威学术期刊上发表学术论文20余篇,授权国家发明专利3项。
引用本文:    
颉芳霞, 杨豪, 黄家兵, 何雪明, 俞经虎. 粉末冶金Ti-xNb-5Sn骨科合金的摩擦学行为[J]. 材料导报, 2022, 36(21): 21050088-5.
XIE Fangxia, YANG Hao, HUANG Jiabing, HE Xueming, YU Jinghu. Tribological Behavior of Ti-xNb-5Sn Orthopedic Alloys Prepared by Powder Metallurgy. Materials Reports, 2022, 36(21): 21050088-5.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21050088  或          http://www.mater-rep.com/CN/Y2022/V36/I21/21050088
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