期刊文献+
共找到26篇文章
< 1 2 >
每页显示 20 50 100
Corrosion behavior and mechanical property of Mg-4Li-1Ca alloys under micro-compressive stress 被引量:1
1
作者 Yuanyuan Wang Chengbao Liu +6 位作者 Zuojun Jiao Lei Cai Cong Sun Deming Wang Lanyue Cui Cuie Wen Rong-Chang Zeng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第8期170-184,共15页
Biomedical materials may suffer from stress-induced corrosion when performing as implant materials at load-bearing sites, bringing about variations in the microstructure, corrosion resistance, and mechanical propertie... Biomedical materials may suffer from stress-induced corrosion when performing as implant materials at load-bearing sites, bringing about variations in the microstructure, corrosion resistance, and mechanical properties. In this study, the corrosion behavior and mechanical properties of an extruded Mg-4Li-1Ca alloy were investigated under different micro-compressive stresses (0-6 MPa) using a novel homemade loading device. Under 0-3 MPa of micro-compressive stress, the strong basal texture of extruded Mg-4Li1Ca alloys was weakened and the internal stress gradient stimulated grain boundary migration to induce grain growth. Meanwhile, increased stress resulted in the precipitation of second-phase particles and the accumulation of residual stress, accelerating the corrosion rate due to preferential corrosion. However, with increasing stress, the volume fraction of the second phase increased, becoming the dominant factor controlling the corrosion rate, and residual stress was released for samples under 4.5-6 MPa of microcompressive stress. Hence, surface corrosion product films rapidly formed and served as effective physical barriers, weakening the microstructural effect on the corrosion behavior. The yield strength of Mg-4Li-1Ca alloy reached 95.48 MPa under 3 MPa of micro-compressive stress owing to the dual effects of precipitation strengthening and shear-band strengthening. The relationships between microstructure, corrosion behavior, and mechanical property provide a theoretical foundation for understanding the degradation characteristics of the Mg-4Li-1Ca alloy under physiological loading and practical application. 展开更多
关键词 Magnesium alloy biomaterial Compressive stress TEXTURE CORROSION mechanical property
原文传递
Effect of Y addition on microstructure and mechanical properties of Mg-Zn-Mn alloy 被引量:12
2
作者 齐福刚 张丁非 +1 位作者 张孝华 潘复生 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第5期1352-1364,共13页
The effects of Y on the microstructure and mechanical properties of Mg-6Zn-lMn alloy were investigated. The results show that the addition of Y has significant effect on the phase composition, microstructure and mecha... The effects of Y on the microstructure and mechanical properties of Mg-6Zn-lMn alloy were investigated. The results show that the addition of Y has significant effect on the phase composition, microstructure and mechanical properties of Mg-6Zn-lMn alloy. Varied phases compositions, including Mg7Zn3, I-phase (Mg3YZn6), W-phase (Mg3Y2Zn3) and X-phase (MgI2YZn), are obtained by adjusting the Zn to Y mass ratio. Mn element exists as the fine Mn particles, which are well distributed in the alloy. Thermal analysis and microstructure observation reveal that the phase stability follows the trend of X〉W〉/〉MgTZn3. In addition, Y can improve the mechanical properties of Mg-Zn-Mn alloy significantly, and the alloy with Y content of 6.09% has the best mechanical properties. The high strength is mainly due to the strengthening by the grain size refinement, dispersion strengthening by fine Mn particles, and introduction of the Mg-Zn-Y ternary phases. 展开更多
关键词 mg-zn-mn alloy Y MICROSTRUCTURE mechanical property FRACTURE
下载PDF
Ti-Zr-Hf-Nb-Ta-Sn high-entropy alloys with good properties as potential biomaterials 被引量:2
3
作者 Wei Yang Shu-Jie Pang +3 位作者 Guan Wang Ying Liu Peter KLiaw Tao Zhang 《Rare Metals》 SCIE EI CAS CSCD 2022年第7期2305-2315,共11页
(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))_(100-x)Sn_(x)(x=3,5,and 7;at%)high-entropy alloys(HEAs)with good mechanical properties,corrosion resistance,and biocompatibility were developed as potential biomaterials.The ... (Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))_(100-x)Sn_(x)(x=3,5,and 7;at%)high-entropy alloys(HEAs)with good mechanical properties,corrosion resistance,and biocompatibility were developed as potential biomaterials.The effects of Sn additions on the microstructure and properties of the HEAs were investigated.The(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))_(100-x)Sn_(x) with x=3 at%exhibited the single body-centered-cubic(BCC)structure.The HEAs with the further increased Sn contents of x=5 at%and 7 at%were composed of a BCC phase and a hexagonal-close-packed(HCP)-(Sn,Zr)ordered phase.The addition of Sn improved the compres-sive yield strengths and hardness of the HEAs to 1068-1259 MPa and HV 315-HV 390,respectively.These HEAs also possessed relatively low Young's moduli of 80-91 GPa.Among the present Ti-Zr-Hf-Nb-Ta-Sn HEAs,the(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))97Sn3 HEA exhibited the good combination of high yield strength of~1068 MPa,relatively low Young's modulus of 80 GPa,and good plasticity(~45%).The HEAs also possess good bio-corrosion resistance and biocompatibility,parallel to the Ti-6Al-4V alloy.The Ti-Zr-Hf-Nb-Ta-Sn HEAs with the integration of the high yield strength,relatively low Young's modulus,and good corrosion resistance and bio-compatibility are promising for biomedical applications. 展开更多
关键词 High-entropy alloys biomaterials Microstructure mechanical properties Corrosion BIOCOMPATIBILITY
原文传递
Improvement of in vitro corrosion, wear, and mechanical properties of newly developed Ti alloy by thermal treatment for dental applications 被引量:11
4
作者 Mohamed HUSSEIN Akeem YADESINA +3 位作者 Madhan KUMAR Mohamed AZEEM Ahmad SOROUR Nasser AL-AQEELI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第4期952-966,共15页
The effects of thermal treatments on the structure, mechanical properties, wear resistance, and in vitro corrosion protection in artificial saliva(AS) were investigated for a newly developed Ti20 Nb13 Zr(TNZ) alloy. X... The effects of thermal treatments on the structure, mechanical properties, wear resistance, and in vitro corrosion protection in artificial saliva(AS) were investigated for a newly developed Ti20 Nb13 Zr(TNZ) alloy. XRD and SEM analyses were used for structural and microstructural analysis. The in vitro corrosion properties of the samples were investigated using electrochemical impedance spectroscopy and linear polarization resistance techniques up to an immersion time of 168 h. The tribological characteristics were evaluated with a linear reciprocating tribometer. SEM analysis showed that solution treatment and aging influenced the size and distribution of α phase. The air-cooled and aged samples exhibited the highest microhardness and macrohardness, for which the wear resistances were 25% and 30% higher than that of the untreated sample, respectively. The cooling rate significantly influenced the corrosion resistance of the TNZ samples. The treated samples showed a reduced corrosion rate(50%) for long immersion time up to 168 h in AS. The furnace-cooled and aged samples exhibited the highest corrosion resistance after 168 h of immersion in AS. Among the treated samples, the aged sample showed enhanced mechanical properties, wear behavior, and in vitro corrosion resistance in AS. 展开更多
关键词 heat treatment Ti-based alloy microstructure mechanical properties WEAR CORROSION biomaterials
下载PDF
Mechanical properties of a Gum-type Ti–Nb–Zr–Fe–O alloy
5
作者 Anna Nocivin Ion Cinca +2 位作者 Doina Raducanu Vasile Danut Cojocaru Ion Alexandru Popovici 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第8期909-917,共9页
A new Gum-type alloy(Ti–Nb–Zr–Fe–O) in which Fe is used instead of Ta was subjected to a particular thermomechanical processing scheme to assess whether its mechanical characteristics(fine ?-grains with high stren... A new Gum-type alloy(Ti–Nb–Zr–Fe–O) in which Fe is used instead of Ta was subjected to a particular thermomechanical processing scheme to assess whether its mechanical characteristics(fine ?-grains with high strength and low modulus) render it suitable as a biomedical implant material. After a homogenization treatment followed by cold-rolling with 50% reduction, the specimens were subjected to one of three different recrystallization treatments at 1073, 1173, and 1273 K. The structural and mechanical properties of all of the treated specimens were analyzed. The mechanical characterization included tensile tests, microhardness determinations, and fractography by scanning electron microscopy. The possible deformation mechanisms were discussed using the Bo – Md diagram. By correlating all of the experimental results, we concluded that the most promising processing variant corresponds to recrystallization at 1073 K, which can provide suitable mechanical characteristics for this type of alloys: high yield and ultimate tensile strengths(1038 and 1083 MPa, respectively), a low modulus of elasticity(62 GPa), and fine crystalline grain size(approximately 50 ?m). 展开更多
关键词 biomaterials mechanical properties Gum-type ALLOY THERMOmechanical processing TENSILE test
下载PDF
Influence of Nb addition on microstructural evolution and compression mechanical properties of Ti-Zr alloys 被引量:1
6
作者 Pengfei Ji Bohan Chen +5 位作者 Bo Li Yihao Tang Guofeng Zhang Xinyu Zhang Mingzhen Ma Riping Liu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2021年第10期7-14,共8页
In order to expand the application horizon of Ti-Zr based alloys,the influence of Nb content on phase composition,microstructural evolution and biomechanical properties is systematically studied.The phase and microstr... In order to expand the application horizon of Ti-Zr based alloys,the influence of Nb content on phase composition,microstructural evolution and biomechanical properties is systematically studied.The phase and microstructural characterization of the as-cast alloys is carried out by X-ray diffraction,optical microscopy and transmission electron microscopy.The results reveal that Nb-containing Ti-Zr alloys transformed from single a phase→α+α"+β phase single β phase double β phases with increasing Nb content.In the case of β-type alloys,the addition of Nb improves the bonding energy between atoms,reduces the grain size,increases the elastic modulus,improves the yield strength and renders superior work-hardening behavior.Moreover,the current study provides mechanistic insights into microstructural evolution and strengthening of Nb-containing Ti-Zr alloys with increasing Nb content.Herein,the addition of 5 at.% Nb resulted in an abnormal work hardening during compression deformation under the synergistic influence of stress-induced martensite transformation of β phase and stress-induced twinning of α phase.Moreover,the biomechanical properties are evaluated to demonstrate the potential of Nb-containing Ti-Zr alloys in biological applications. 展开更多
关键词 Ti-Zr based alloy biomaterials Microstructural evolution mechanical properties
原文传递
可降解医用Zn-3Al-1Mg合金的体外腐蚀行为和力学性能
7
作者 刘晓倩 刘翠 +1 位作者 乔爱科 穆永亮 《材料与冶金学报》 CAS 北大核心 2024年第2期181-189,196,共10页
采用热挤压方法制备了管状Zn-3Al-1Mg合金,利用扫描电子显微镜(SEM)及拉伸、压缩测试等方法研究了铸态和挤压态管状Zn-3Al-1Mg合金的微观组织与力学性能同时,利用浸泡试验、电化学测试、X射线光电子能谱分析(XPS)研究了挤压态管状Zn-3Al... 采用热挤压方法制备了管状Zn-3Al-1Mg合金,利用扫描电子显微镜(SEM)及拉伸、压缩测试等方法研究了铸态和挤压态管状Zn-3Al-1Mg合金的微观组织与力学性能同时,利用浸泡试验、电化学测试、X射线光电子能谱分析(XPS)研究了挤压态管状Zn-3Al-1Mg合金在模拟体液(SBF)溶液中的腐蚀行为结果表明:铸态及挤压态合金均由η-Zn,α-Al及Mg2Zn11三相组成,挤压态合金的微观组织明显细化,且力学性能明显优于铸态合金的力学性能挤压态合金在模拟体液中的腐蚀速率为015~028 mm/a腐蚀形貌分析结果揭示了不同物相间的微电偶腐蚀机制,腐蚀产物包括Zn/Al/Mg的氧化物、氢氧化物,以及Ca,P和Zn/Al/Mg相结合产生的磷酸盐、碳酸盐结合电化学测试结果,对挤压态合金的腐蚀过程和腐蚀机理进行了分析. 展开更多
关键词 ZN合金 生物材料 力学性能 模拟体液 降解行为
下载PDF
新型医用Mg-Nd-Zn-Zr镁合金在模拟体液中的降解行为 被引量:43
8
作者 张佳 宗阳 +3 位作者 袁广银 常建卫 付鹏怀 丁文江 《中国有色金属学报》 EI CAS CSCD 北大核心 2010年第10期1989-1997,共9页
采用光学显微镜、扫描电子显微镜、析氢实验和电化学实验等研究高纯Mg、AZ91D和新开发的Mg-Nd-Zn-Zr(JDBM)合金在模拟体液中的腐蚀行为。结果表明:JDBM和高纯Mg的平均腐蚀速率远低于AZ91D的,且前二者的腐蚀表面较平整,为一种均匀腐蚀方... 采用光学显微镜、扫描电子显微镜、析氢实验和电化学实验等研究高纯Mg、AZ91D和新开发的Mg-Nd-Zn-Zr(JDBM)合金在模拟体液中的腐蚀行为。结果表明:JDBM和高纯Mg的平均腐蚀速率远低于AZ91D的,且前二者的腐蚀表面较平整,为一种均匀腐蚀方式;而AZ91D的表面有许多贯连的腐蚀深坑,是一种典型的点蚀方式。动电位极化曲线、电化学阻抗谱和析氢实验也表明,JDBM和高纯Mg的耐蚀性比AZ91D的好,JDBM合金在模拟体液中的腐蚀性能接近于高纯镁的。力学性能测试表明,JDBM镁合金具有优良的综合力学性能,满足生物材料对力学性能的要求。 展开更多
关键词 镁合金 生物材料 模拟体液 降解行为 力学性能
下载PDF
医用钛合金生物学及机械性能评述 被引量:10
9
作者 胡欣 魏强 +1 位作者 李长义 张连云 《材料导报》 EI CAS CSCD 北大核心 2009年第19期57-60,共4页
从生物学和力学性能角度出发,评述了生物医用钛合金实现特定生理功能需具有不同性能要求。以硬组织替代、介入性治疗钛合金及口腔修复用钛合金在生物学性能要求上的不同和在弹性模量等力学性能方面的差异为例,结合医用钛合金设计制造的... 从生物学和力学性能角度出发,评述了生物医用钛合金实现特定生理功能需具有不同性能要求。以硬组织替代、介入性治疗钛合金及口腔修复用钛合金在生物学性能要求上的不同和在弹性模量等力学性能方面的差异为例,结合医用钛合金设计制造的具体实例,阐明了钛合金生物医用功能需求的多样性,为钛合金在生物医用领域的分类与设计提供了一种新的思路和借鉴。 展开更多
关键词 钛合金 生物医用材料 生物学性能 机械性能
下载PDF
医用镁合金降解及其对人体的影响 被引量:8
10
作者 高家诚 胡德 宋长江 《功能材料》 EI CAS CSCD 北大核心 2012年第19期2577-2583,共7页
镁合金具有比高分子更高的强度、比陶瓷材料更好的韧性,与人体自然骨的密度、弹性模量和力学性能也更为接近。更重要的是,其植入人体后将会逐步腐蚀降解,既无毒副作用也无需二次手术,是一种极具潜质的新型可降解生物金属材料。但镁在人... 镁合金具有比高分子更高的强度、比陶瓷材料更好的韧性,与人体自然骨的密度、弹性模量和力学性能也更为接近。更重要的是,其植入人体后将会逐步腐蚀降解,既无毒副作用也无需二次手术,是一种极具潜质的新型可降解生物金属材料。但镁在人体生理环境中腐蚀速度太快,可能导致镁离子、氢气、局部pH值和腐蚀沉淀物在体内发生堆积,同时镁合金的机械完整性和力学性能也会因此丧失,达不到预期的治疗目的,甚至引起不良反应和治疗失败。从镁在人体的腐蚀机理和降解产物对人体造成的影响进行综述,并分析了镁合金在未来的发展方向和挑战。 展开更多
关键词 镁合金 生物材料 降解 氢气 力学性能
下载PDF
钙对铸态医用Mg-6%Zn-x%Ca合金组织和力学性能的影响 被引量:5
11
作者 张永虎 宋义全 耿丽彦 《热加工工艺》 CSCD 北大核心 2012年第11期29-30,34,共3页
研究了不同钙含量对铸态下医用Mg-6%Zn-x%Ca镁合金的显微组织和力学性能的影响。结果表明,随着钙含量的增加,合金的晶粒尺寸明显变小,显微硬度明显提高;能谱分析发现,钙主要分布在晶界处,也有少量钙溶解于α-Mg固熔体中。热模拟实验表明... 研究了不同钙含量对铸态下医用Mg-6%Zn-x%Ca镁合金的显微组织和力学性能的影响。结果表明,随着钙含量的增加,合金的晶粒尺寸明显变小,显微硬度明显提高;能谱分析发现,钙主要分布在晶界处,也有少量钙溶解于α-Mg固熔体中。热模拟实验表明,成分为Mg-6%Zn-3%Ca的镁合金抗压强度和屈服强度最高。 展开更多
关键词 生物材料 Mg-Zn-Ca合金 显微组织 力学性能
下载PDF
Mg-Y基生物材料研究进展 被引量:2
12
作者 彭秋明 付辉 李慧 《燕山大学学报》 CAS 北大核心 2015年第4期292-297,305,共7页
近年来,镁合金作为一种新型可降解金属生物材料,受到越来越多研究者的关注。Mg-Y基生物材料具有生物相容性好、力学性能优以及可降解吸收等优点,逐渐成为材料和医学领域的研究重点。本文主要阐述了国内外Mg-Y基生物材料的制备工艺、性... 近年来,镁合金作为一种新型可降解金属生物材料,受到越来越多研究者的关注。Mg-Y基生物材料具有生物相容性好、力学性能优以及可降解吸收等优点,逐渐成为材料和医学领域的研究重点。本文主要阐述了国内外Mg-Y基生物材料的制备工艺、性能及其应用。同时,指出了Mg-Y基生物材料目前需要解决的问题和未来的研究方向,并展望了未来Mg-Y基生物材料的应用前景。 展开更多
关键词 镁合金 生物材料 力学性能 降解性能 生物相容性
下载PDF
Mn对生物医用Ti-Mo合金组织与力学性能的影响 被引量:5
13
作者 武晓峰 杨会齐 王春雨 《中国有色金属学报》 EI CAS CSCD 北大核心 2017年第9期1902-1908,共7页
采用非自耗真空电弧炉制备Ti-8Mo-xMn系列合金,以考察Mn的添加对生物医用Ti-Mo合金显微组织与力学性能的影响。结果表明:两元Ti-Mo合金主要由细小的针状α″马氏体相组成,加入1%Mn(质量分数)后,等轴晶的β相大部被保留;当Mn的加入量达... 采用非自耗真空电弧炉制备Ti-8Mo-xMn系列合金,以考察Mn的添加对生物医用Ti-Mo合金显微组织与力学性能的影响。结果表明:两元Ti-Mo合金主要由细小的针状α″马氏体相组成,加入1%Mn(质量分数)后,等轴晶的β相大部被保留;当Mn的加入量达到3%后,β相全部被保留到室温。拉伸力学测试发现:β相不稳定的Ti-8Mo-1Mn合金在拉伸过程中发生应力诱导的从β相到α″相的马氏体转变,呈现出"双屈服"现象。加入少量Mn(1%和3%)提高合金塑性,伸长率由35%最大提高到53%。Mn量增加到5%、7%后,合金强度得到大幅提高,抗拉强度最大由856 MPa提高到1201 MPa,同时伸长率为22%。所有含Mn合金的显微硬度都较高,最高为386HV,是两元Ti-Mo合金的(251HV)1.65倍。含ω相的Ti-8Mo-1Mn合金的弹性模量最高,达150 GPa。其它含Mn合金的弹性模量在76~87 GPa之间,与人骨骼的接近,有潜力成为生物医用材料。 展开更多
关键词 TI-MO合金 显微组织 力学性能 生物材料
下载PDF
锌对铸态医用Mg-1Ca-xZn合金组织和显微硬度的影响 被引量:1
14
作者 张永虎 宋义全 耿丽彦 《轻合金加工技术》 CAS 北大核心 2012年第7期27-30,共4页
利用金相显微镜、扫描电镜、XRD、能谱仪及显微硬度计研究了三种不同锌含量的铸态医用Mg-1Ca-xZn(x=4%,6%,8%)的显微组织与力学性能。结果表明:铸态Mg-1Ca-xZn合金中主要存在α-Mg相及少量MgZn相和Mg2Ca相。随着锌含量的增加,合金中MgZ... 利用金相显微镜、扫描电镜、XRD、能谱仪及显微硬度计研究了三种不同锌含量的铸态医用Mg-1Ca-xZn(x=4%,6%,8%)的显微组织与力学性能。结果表明:铸态Mg-1Ca-xZn合金中主要存在α-Mg相及少量MgZn相和Mg2Ca相。随着锌含量的增加,合金中MgZn相明显增多,合金的基体晶粒组织得到了明显的细化,且合金的显微硬度增加。第二相MgZn的增加使Mg-1Ca-xZn合金得到了强化。 展开更多
关键词 生物材料 ZN Mg-Zn-Ca合金 显微组织 力学性能
下载PDF
Zn对医用Mg-Mn合金显微组织的影响
15
作者 李云 吴兵 《新技术新工艺》 2014年第4期110-111,共2页
Mg合金具有可降解性、生物学特性和力学相容性等一系列特性,是一种极具发展潜力的新型可降解生物医用材料。本文采用真空气氛保护金属型Mg-Zn-Mn合金,通过金相组织观察和硬度试验,研究了合金的性能。结果表明:纯Mg中添加合金元素Zn和Mn... Mg合金具有可降解性、生物学特性和力学相容性等一系列特性,是一种极具发展潜力的新型可降解生物医用材料。本文采用真空气氛保护金属型Mg-Zn-Mn合金,通过金相组织观察和硬度试验,研究了合金的性能。结果表明:纯Mg中添加合金元素Zn和Mn可显著地细化晶粒,Zn含量的变化对Mg合金晶粒尺寸影响较小;Mg合金硬度随着Zn含量的增加而提高,并且Zn具有较好的固溶强化效果;Mg合金固溶处理后,晶粒发生一定程度上的长大,Mg合金硬度随Zn含量的增加而提高,这说明固溶强化的效果强于晶粒粗化而造成的力学性能降低。 展开更多
关键词 生物材料 Mg—Zn—Mn合金 力学性能
下载PDF
生物医用Ta-Zr合金的制备及性能 被引量:1
16
作者 常林 刘珏 +1 位作者 杨海林 阮建明 《中国有色金属学报》 EI CAS CSCD 北大核心 2017年第10期2046-2052,共7页
采用粉末冶金方法,应用真空烧结技术对Ta-xZr(x=20,30,40,50,摩尔分数,%)合金进行研究,制备出力学性能良好的高致密Ta-Zr合金。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线能谱仪(EDS)和电子万能试验机对样品的相成分、表面形貌... 采用粉末冶金方法,应用真空烧结技术对Ta-xZr(x=20,30,40,50,摩尔分数,%)合金进行研究,制备出力学性能良好的高致密Ta-Zr合金。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线能谱仪(EDS)和电子万能试验机对样品的相成分、表面形貌及力学性能进行检测与观察。结果表明:Ta-Zr合金烧结过程中没有第二相形成,有层片状Ta组织析出。抗拉强度在181.0~290.2 MPa范围内变化,弹性模量在16.1~20.9 GPa范围内变化,随Ta含量的增加均呈现出先增大后减小的趋势。其中Ta-30Zr与人体密质骨力学相容性好,有望成为理想的骨替代材料。 展开更多
关键词 生物材料 Ta-Zr合金 析出相 密质骨 力学性能
下载PDF
添加Sn元素对Zr-16Nb-xTi(x=4 wt%,16 wt%)合金弹性模量及磁化率的影响 被引量:1
17
作者 薛人豪 王东 +3 位作者 田悦言 邓子旋 刘立斌 章立钢 《Journal of Central South University》 SCIE EI CAS CSCD 2023年第2期412-418,共7页
低弹性模量及低磁化率是新型生物医用合金设计过程中所需要的关键性能,但是目前已有的许多医用合金由于不能满足这两种关键性能的要求,从而被限制了其在临床医学上的应用,因此,本文提出了一种通过添加Sn元素来降低生物合金弹性模量和磁... 低弹性模量及低磁化率是新型生物医用合金设计过程中所需要的关键性能,但是目前已有的许多医用合金由于不能满足这两种关键性能的要求,从而被限制了其在临床医学上的应用,因此,本文提出了一种通过添加Sn元素来降低生物合金弹性模量和磁化率的方法。根据之前的关于Sn含量对Zr合金力学性能及磁性影响的研究及文献的报道,选择在Zr-16Nb-xTi (x=4 wt%,16 wt%)合金中添加4%和6%的Sn。通过表征Zr-16Nb-xTi-ySn (x=4 wt%,16 wt%;y=4 wt%,6 wt%)合金的微观组织,力学性能和磁性能后发现,随着Sn元素含量的增加,Zr-16Nb-xTi-ySn (x=4 wt%,16 wt%;y=4 wt%,6 wt%)合金中的β相和马氏体α″相含量分别呈现出上升和下降的趋势,除了Zr-16Nb-4Ti-6Sn之外,Zr-16Nb-xTi-ySn (x=4 wt%,16 wt%;y=4 wt%,6 wt%)合金的弹性模量,强度及伸长率随着Sn含量的增加而增加。随着Sn含量从4%增加到6%,Zr-16Nb-16Ti合金的磁化率下降最为明显。弹性模量的变化与合金中β和α″马氏体相含量的变化密切相关,添加Sn元素可以促进α′马氏体转变为与β相结构更为接近的α″马氏体,同时Sn元素本身的磁化率极低,这是合金总体磁化率下降的主要原因。在所研究的合金中,Zr-16Nb-4Ti-6Sn展示出最低的弹性模量及磁化率,显示出最优异的综合性能。 展开更多
关键词 生物医用材料 锆合金 力学性能 磁性能
下载PDF
Novel Magnesium Alloys Developed for Biomedical Application:A Review 被引量:65
18
作者 Nan Li Yufeng Zheng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2013年第6期489-502,共14页
There is an increasing interest in the development of magnesium alloys both for industrial and biomedical applications. Industrial interest in magnesium alloys is based on strong demand of weight reduction of transpor... There is an increasing interest in the development of magnesium alloys both for industrial and biomedical applications. Industrial interest in magnesium alloys is based on strong demand of weight reduction of transportation vehicles for better fuel efficiency, so higher strength, and better ductility and corrosion resistance are required. Nevertheless, biomedical magnesium alloys require appropriate mechanical properties, suitable degradation rate in physiological environment, and what is most important, biosafety to human body. Rather than simply apply commercial magnesium alloys to biomedical field, new alloys should be designed from the point of view of nutriology and toxicology. This article provides a review of state-of-the-art of magnesium alloy implants and devices for orthopedic, cardiovascular and tissue engineering applications. Advances in new alloy design, novel structure design and surface modification are overviewed. The factors that influence the corrosion behavior of magnesium alloys are discussed and the strategy in the future development of biomedical magnesium alloys is proposed. 展开更多
关键词 biomaterials Magnesium alloys BIODEGRADATION mechanical property BIOCOMPATIBILITY
原文传递
In vitro degradation and biocompatibility of Mg-Li-Ca alloys—the influence of Li content 被引量:9
19
作者 Lanyue Cui Lu Sun +2 位作者 Rongchang Zeng Yufeng Zheng Shuoqi Li 《Science China Materials》 SCIE EI CSCD 2018年第4期607-618,共12页
Mg-Li based alloys hold much attention as potential biomedical materials due to their excellent ductility. A reduced mechanical strength and concern for biocompatibility are exhibited for Mg-Li binary alloys due to th... Mg-Li based alloys hold much attention as potential biomedical materials due to their excellent ductility. A reduced mechanical strength and concern for biocompatibility are exhibited for Mg-Li binary alloys due to the presence of Li element. Addition of the Ca element into Mg-Li alloys leads to an improvement in mechanical strength and biocompatibility.In the present work, the microstructure, mechanical property and corrosion behaviors of three kinds(α, α+β, β) of as-extruded Mg-Li(1, 9 and 15 wt.%)-1 Ca alloys were investigated using optical microscope, X-ray diffraction(XRD), tensile,immersion and electrochemical polarization measurements.In vitro biocompatibility was evaluated by cytotoxicity assays,hemolysis and four coagluation tests. The results indicated that the Mg-1 Li-1 Ca and Mg-15 Li-1 Ca alloys were characterized by α-Mg and β-Li phases besides Mg2 Ca particles, respectively; while the Mg-9 Li-1 Ca by dual(α-Mg+β-Li) phase together with Mg2 Ca phase. The Mg-1 Li-1 Ca alloy had the highest ultimate tensile strength(UTS) and yield strength(YS)and the lowest elongation(EL) to failure(10.1±1.24%) as well.The EL for the Mg-9 Li-1 Ca alloy was the highest(52.2±0.01%).The long-term immersion tests revealed a decrease in corrosion resistance with increasing Li content. The results of cytotoxicity assays clearly showed that the Mg-Li-Ca alloys demonstrated no toxicity to L-929 cells in 10% concentration of extracts. The Mg-1 Li-1 Ca alloy also exhibited an acceptable hemolysis ratio. The results of four coagulation tests designated no sign of thrombogenicity for the Mg-Li-Ca alloys except for the Mg-15 Li-1 Ca alloy. 展开更多
关键词 magnesium alloy DEGRADATION mechanical property BIOCOMPATIBILITY biomaterial
原文传递
Ca和Ag的含量对可降解Zn-Li-Ca-Ag合金的组织和性能的影响
20
作者 闫俊竹 高明 +1 位作者 于晓明 谭丽丽 《材料研究学报》 EI CAS CSCD 北大核心 2024年第3期177-186,共10页
制备可降解Zn-Li-Ca-Ag合金,使用光学显微镜(OM)、扫描电镜(SEM)、万能试验机和电化学测试等手段研究了Ca和Ag的含量对这种合金的微观组织、力学性能和耐蚀性能的影响。结果表明:Zn-Li-Ca-Ag合金的微观组织由树枝晶组成,Ca通过第二相强... 制备可降解Zn-Li-Ca-Ag合金,使用光学显微镜(OM)、扫描电镜(SEM)、万能试验机和电化学测试等手段研究了Ca和Ag的含量对这种合金的微观组织、力学性能和耐蚀性能的影响。结果表明:Zn-Li-Ca-Ag合金的微观组织由树枝晶组成,Ca通过第二相强化使锌合金的强度提高,Ag细化枝晶使锌合金的塑性提高。Zn-0.8Li-0.1Ca-0.2Ag合金的抗拉强度达到了186 MPa。Ca和Ag都能提高锌合金的耐蚀性能。 展开更多
关键词 生物材料 锌合金 力学性能 耐蚀性能
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部