Inter-American Materials Collaboration (CIAM): Stability, Durability and Crystallization of Iron Phosphate Glasses

非技术描述：密苏里大学罗拉分校(UMR)、巴西圣卡洛斯联邦圣卡洛斯大学(UFSCar)和阿根廷圣卡洛斯国家能源原子中心(CNEA)的材料研究小组正在开展一项为期多年的国际研究计划。该计划将专注于磷酸铁基玻璃和熔体的特性。这些玻璃用于高水平的核废料固定、可生物吸收的医疗植入物和其他几种用途。合作研究将调查这些玻璃的耐析晶性、耐腐蚀性和对辐射的响应。该计划还将涉及美国和巴西学生的交流，他们将在这两个机构进行研究，并参与教育机会。技术细节：在UFSCar上，将使用UMR和UFSCar开发的一系列新的热分析技术来测量这些玻璃的析晶动力学。在CNEA，这些玻璃的耐腐蚀性将在各种流体中进行测量，并对玻璃进行辐射。辐照对玻璃性能的影响将在UFSCar(晶化动力学)、UMR(结构)和CNEA(腐蚀、结构)中进行评估。在UMR，对这些体系的相平衡的研究将确定液相线温度和平衡晶相。人员交流将使学生和教职员工都能学习每个研究所开发的研究技术。这项工作由国际科学与工程办公室和材料研究部联合支持。

NON-TECHNICAL DESCRIPTION: A multi-year international research program is under-way between materials research groups from the University of Missouri - Rolla (UMR), the Universidade Federal do Sao Carlos of Sao Carlos, Brazil (UFSCar), and the Centro Atomico Bariloche of the Comision Nacional Energia Atomico of San Carlos de Bariloche, Argentina (CNEA). The program will focus on the characteristics of iron phos-phate-based glasses and melts. These glasses are of interest for high-level nuclear waste fixation, bioresorbable medical implants, and several other uses. Cooperative research will investigate the resistance to crystallization, corrosion resistance, and response to irradiation of these glasses. The program will also involve the interchange of American and Brazilian students, who will conduct research at both institutions as well as partici-pating in educational opportunities.TECHNICAL DETAILS: At UFSCar, the crystallization kinetics of these glasses will be measured, using a series of new thermal-analysis techniques developed at UMR and UFSCar. At CNEA the corrosion resistance of these glasses will be measured in a variety of fluids, and the glasses will be irradiated. The impact of irradiation on glass properties will be assessed at UFSCar (crystallization kinetics), UMR (structure), and CNEA (corrosion, structure). At UMR, an investigation of phase equilibria in these systems will de-termine liquidus temperatures and equilibrium crystalline phases. The exchange of personnel will allow students and faculty alike to learn research techniques developed at each institution.This work is jointed supported by the Office of International Science and Engineering and the Division of Materials Research.