3篇
您的检索式：作者名="Gloria ACOSTA"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 暴露在加勒比海水中的2219-T42和6061-T6铝合金表面初始局部腐蚀行为的比较(英文)显示文摘将6061-T6和2219-T42铝合金样品暴露在加勒比海水中90 d。将开路电位的波动作为电化学噪声(EN),用来表征和比较合金表面的初始点蚀行为。采用功率谱密度(PSD)与频率的关系图进行电化学噪声分析。PSD图中指数β的减小表明,随着海水中铝合金点蚀的进行,出现自发的能量释放。开路电位的波动与新腐蚀层的破裂和形成有关。PSD图中指数β的变化趋势表明,AA2219-T42铝合金的腐蚀过程是一个持续的非稳态过程,其动力学行为受分形布朗运动(fBm)控制;AA6061-T6铝合金的腐蚀过程则主要表现出稳态和弱持久性的特性,这是由于分形高斯噪声(fGn)的贡献。将合金暴露于海水中后进行扫描电镜-X射线能谱(SEM-EDX)分析,发现合金上存在富含Cu或Fe、不规则分布的不溶性金属间化合物颗粒。AA2219-T42合金中Mg和Al的优先溶解发生在S相(Al_2CuMg)。 | Gloria ACOSTA Lucien VELEVA Juan Luis LóPEZ D.A.LóPEZ-SAURI | 2019 | Transactions of Nonferrous Metals Society of China2019，29，1： | 7 |
| 2 | Assessment of Mg(OH)_(2)/TiO_(2) coating in the Mg-Ca-Zn alloy for improved corrosion resistance and antibacterial performance显示文摘The high activity of metallic magnesium and alloys limits its potential in biomedical applications;in recent years,extensive efforts have been devoted to modulating this reactivity.In this work,we present Mg(OH)_(2) and TiO_(2)barrier coatings to reduce the degradation of magnesium alloy(Mg-Ca-Zn)surfaces.These coatings were deposited by the anodization method and the spin-coating technique,respectively.The anodized layer was coated with TiO_(2)generated from the hydrolysis of 3%weight of TTIP(Ti[OCH(CH_(3))_(2)]_(4),Titanium(IV)isopropoxide)in 2-Propanol deposited by the spin-coating method.Studying the degradation in Ringer’s solution by electrochemical impedance spectroscopy and OCP revealed a 98%reduction in pittings in uncoated samples after 14 days of immersion.The p H measurements revealed that the TiO_(2)coating reduced the alkalization of the physiological environment,keeping the pH at 6.0 values.In vitro studies of two types of bacteria(E.coli and S.aureus)exhibited zones of inhibition in the agar and activity bactericidal(kill time test).The mechanisms behind the improved degradation resistance and enhanced antibacterial activity are presented and discussed here.Surface modification with Mg(OH)_(2)/TiO_(2)coatings is a promising strategy to control the biodegradation of magnesium implants for bone regeneration. | Leonardo Hernández Jesús Ramón-Sierra Montserrat Soria-Castro Ángel Bacelis Geonel Rodríguez-Gattorno Elizabeth Ortiz-Vázquez Gloria Acosta | 2023 | Journal of Magnesium and Alloys2023，11，1： | 0 |
| 3 | Foliar Analysis as an Estimate on the Nutritional State of Conilon Coffee Plantations on Cambisoils显示文摘 | Alberto Perez Diaz Emesto Castaneda Hidalgo Salvador Lozano Trejo Carlos Alberto Bustamante Gonzailez Ramon Antonio Rivera Espinosa Geraldo Rodriguez Ortiz Gloria Martha Martin Alonso Cerelino RoblesPerez Guillermo Acosta Coutin Alberto Fernandez Turro | 2014 | Journal of Life Sciences2014，8，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员