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| 1 | 微波烧结生物医用多孔Ti-23%Nb形状记忆合金的参数优化(英文)显示文摘采用微波烧结法成功制备多孔Ti-23%Nb(摩尔分数)形状记忆合金(SMAs)(不含造孔剂)。研究微波烧结对合金显微组织、相组成、相变温度、力学性能和形状记忆效应的影响。结果表明,烧结时间和温度对合金密度和孔隙度大小的影响较大,在900℃下烧结30 min的Ti-23%Nb SMA具有最小的孔径和最均匀的孔形状。多孔Ti-Nb SMA的显微组织主要含有针状和片状的α'、α和β相,且体积分数随烧结时间和温度不同而变化。由于β相稳定元素的含量较高,因此β相含量最多,而α和α'相的含量较少。900℃烧结30 min的样品呈现最优的极限强度和应变,而1200℃烧结30 min的样品则具有最高的超弹性。这些合金的弹性模量较低,可以避免'应力屏蔽'效应。因此,微波加热可以应用于烧结生物医用Ti合金并提高其力学性能。 | Mustafa K.IBRAHIM E.HAMZAH Safaa N.SAUD E.M.NAZIM A.BAHADOR | 2018 | Transactions of Nonferrous Metals Society of China2018，28，4： | 5 |
| 2 | 银-沸石掺杂羟基磷灰石镁合金涂层的生物活性、体外腐蚀行为和抗菌活性(英文)显示文摘Mg-based alloys received significant attention for temporary implant applications while, their applications have been limited by high degradation rate. Therefore, silver-zeolite doped hydroxyapatite(Ag-Zeo-HAp) coating was synthesized on Ti O_2-coated Mg alloy by physical vapour deposition(PVD) assisted electrodeposition technique to decrease the degradation rate of Mg alloy. X-ray diffraction(XRD) analysis and field emission scanning electron microscopy(FE-SEM) images showed the formation of a uniform and compact layer of Ag-Zeo-HAp with a thickness of 15 μm on the Ti O_2 film with a thickness of 1 μm. The potentiodynamic polarization(PDP) and electrochemical impedance spectroscopy(EIS) tests indicated that corrosion resistance of Mg-Ca alloy was considerably increased by the Ag-Zeo-HAp coating. The bioactivity test in the simulated body fluid(SBF) solution showed that a dense and homogeneous bonelike apatite layer was formed on the Ag-Zeo-HAp surface after 14 d. Investigation of antibacterial activity via disk diffusion and spread plate methods showed that the Ag-Zeo-HAp coating had a significantly larger inhibition zone(3.86 mm) towards Escherichia coli(E. coli) compared with the Ti O_2-coated Mg alloy(2.61 mm). The Ag-Zeo-HAp coating showed high antibacterial performance, good bioactivity, and high corrosion resistance which make it a perfect coating material for biomedical applications.镁基合金作为临时植入材料的应用受到了越来越多的关注,然而,由于其降解速率高,因此应用受到了限制。为了降低镁合金的降解速率,本文作者采用物理气相沉积(PVD)辅助电沉积技术在镀氧化钛(Ti O_2)的镁合金上涂覆掺银-沸石羟基磷灰石(Ag-Zeo-HAp)涂层。X射线衍射(XRD)分析和场发射扫描电镜(FESEM)图片显示,在厚度约为1μm的二氧化钛薄膜上形成了均匀且致密的Ag-Zeo-HAp涂层,厚度约为15μm。动电位极化(PDP)和电化学阻抗谱(EIS)测试表明,通过Ag-Zeo-HAp涂层,Mg-Ca合金的耐腐蚀性大大提高。模拟体液(SBF)浸泡测试生物活性试验结果表明,在14 d后的Ag-Zeo-HAp表面上形成了一层致密且均匀的类骨磷灰石层。采用琼脂扩散法和平板涂布法对抗菌活性进行研究。结果表明,与Ti O_2涂层的镁合金(2.61 mm)相比,Ag-Zeo-HAp涂层对大肠杆菌(E.coli)的抑制区(3.86 mm)明显增大。Ag-Zeo-HAp涂层具有良好的抗菌性能、良好的生物活性和耐腐蚀性,是生物医学应用的理想涂层材料。 | H.R.BAKHSHESHI-RAD E.HAMZAH A.F.ISMAIL M.AZIZ E.KARAMIAN N.IQBAL | 2018 | Transactions of Nonferrous Metals Society of China2018，28，8： | 5 |
| 3 | 表面涂覆含氟羟基磷灰石和缺钙羟基磷灰石的镁合金体外降解行为(英文)显示文摘通过电化学沉积方法,在生物降解镁合金表面覆盖含氟羟基磷灰石(FHA)涂层和缺钙羟基磷灰石(CDHA)涂层。采用X射线衍射、傅立叶变换红外光谱、透射电子显微镜、扫描电子显微镜和能量色散X射线光谱研究涂层特性。结果表明:涂覆纳米FHA涂层的样品具有垂直于样品表面的纳米针状结构,比涂覆CDHA涂层样品的结构更致密和更均匀。纳米FHA涂层比纳米CDHA涂层具有更小的晶粒尺寸,分别为65 nm和95 nm。然而,CDHA涂层比FHA涂层更厚,厚度分别为19μm和15μm。通过极化、浸泡和析氢实验研究的腐蚀行为表明:纳米FHA涂层和纳米CDHA涂层显著降低腐蚀速率并引起钝化。纳米FHA和纳米CDHA涂层可以加速骨状磷灰石层的形成,相比未覆盖的镁合金可以显著减少溶出速率。纳米FHA涂层能对镁合金提供有效的防护并具有更高的腐蚀性能。因此,覆盖纳米FHA涂层的镁合金在整形外科领域具有良好的应用前景。 | H.R.BAKHSHESHI-RAD E.HAMZAH M.DAROONPARVAR M.A.M.YAJID M.KASIRI-ASGARANI M.R.ABDUL-KADIR M.MEDRAJ | 2014 | Transactions of Nonferrous Metals Society of China2014，24，8： | 3 |
| 4 | Thermal Characteristics,Mechanical Properties,In Vitro Degradation and Cytotoxicity of Novel Biodegradable Zn-Al-Mg and Zn-Al-Mg-xBi Alloys显示文摘Ternary Zn-0.5Al-0.5Mg and quaternary Zn-0.5Al-0.5Mg-xBi(x = 0.1,0.3 and 0.5) alloys were studied to evaluate the thermal and structural characteristics,mechanical properties,cytotoxicity and in vitro degradation behavior.Thermal analysis and microstructural observations showed that Zn-0.5Al-0.5Mg is composed of FCC-A1 + HCPZn + Mg_2(Zn,Al)_(11) while a new phase α-Mg_3Bi_2 appeared after the addition of Bi to the Zn-0.5Al-0.5Mg ternary alloy.The results revealed that the quaternary Zn-Al-Mg-Bi alloys have higher tensile strength,elongation and hardness but slightly lower corrosion resistance than those of the ternary Zn-Al-Mg alloy.Based on the MTT assay,the Zn-Al-Mg and Zn-Al-Mg-Bi alloys were found to be biocompatible,and thus,they can be considered for further investigation in an in vivo environment. | H.R.Bakhsheshi-Rad E.Hamzah H.T.Low M.H.Cho M.Kasiri-Asgarani S.Farahany A.Mostafas M.Medraj | 2017 | Acta Metallurgica Sinica(English Letters)2017，30，3： | 2 |
| 5 | 四元形状记忆合金Cu-Al-Ni-X(X=Mn,Ti)的显微组织和腐蚀特征(英文)显示文摘采用场发射扫描电子显微镜、透射电子显微镜、X射线衍射和差示扫描量热法,并在NaCl溶液中进行电化学和浸渍试验,研究添加不同含量的Mn或Ti(0.4%,0.7%,和1.0%,质量分数)对Cu-Al-Ni形状记忆合金的显微组织、形状记忆效应和腐蚀行为的影响。研究结果表明,显微组织、形状记忆效应和腐蚀特征对成分变化高度敏感。当添加0.7%Mn或0.7%Ti时,合金出现了最高的应变回复率。这可能是由于存在晶粒细化和高体积分数沉淀。电化学测试表明,在Cu-Al-Ni-Mn和Cu-Al-Ni-Ti形状记忆合金中氧化层的形成提供了良好的钝化保护,从而提高了合金的耐蚀性。浸渍试验表明,在Cu-Al-Ni-Mn形状记忆合金中,氧化层发生了点状腐蚀。腐蚀坑附近的腐蚀产物富Al/Mn氧化物而贫铜,而在腐蚀坑内腐蚀产物富铜。在Cu-Al-Ni-Ti形状记忆合金样品表面发生了局部腐蚀,而在基体中发生了脱铝腐蚀。 | S.N.SAUD E.HAMZAH T.ABUBAKAR H.R.BAKHSHESHI-RAD | 2015 | Transactions of Nonferrous Metals Society of China2015，25，4： | 1 |
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