Dilute condition corrosion behavior of glass-ceramic waste form
Dilute condition corrosion behavior of glass-ceramic waste form
复制标题
DOI：
10.1016/j.jnucmat.2016.08.002
复制
发表时间：
2016-12-15
影响因子：
3.1
通讯作者：
Tang, Ming
中科院分区：
文献类型：
--
作者：
Crum, Jarrod V.;Neeway, James J.;Tang, Ming
正在开发硼硅酸盐玻璃陶瓷，以将水后处理产生的高放废物固定成稳定的废物形式。这种多相废物形式的腐蚀行为预计会因多相和晶体玻璃界面而变得复杂。在中性 pH 值（25 摄氏度）和 90 摄氏度下，对抛光整体试片进行改进的单程流通测试 33 d。通过微量分析测得样品中的玻璃腐蚀速率范围为0.019至0.29 g m(-2) d(-1)，每表面积流速= 1.73 x 10(-6) m s(-1)。通过微量分析，晶相（氧磷灰石和富钙磷灰石）的腐蚀速度低于可量化的速率。而O10样品中富Ba硅铝矿腐蚀明显。 C1 及其复制品 C20 的腐蚀速率因冷却过程中热膨胀失配和独特形态（氧磷灰石簇）引起的晶体-玻璃界面处的机械应力而提高了一个数量级。 (C) 2016 Elsevier B.V.
Borosilicate glass-ceramics are being developed to immobilize high-level waste generated by aqueous reprocessing into a stable waste form. The corrosion behavior of this multiphase waste form is expected to be complicated by multiple phases and crystal-glass interfaces. A modified single-pass flow-through test was performed on polished monolithic coupons at a neutral pH (25 degrees C) and 90 degrees C for 33 d. The measured glass corrosion rates by micro analysis in the samples ranged from 0.019 to 0.29 g m(-2) d(-1) at a flow rate per surface area = 1.73 x 10(-6) m s(-1). The crystal phases (oxyapatite and Ca-rich powellite) corroded below quantifiable rates, by micro analysis. While, Ba-rich powellite corroded considerably in O10 sample. The corrosion rates of C1 and its replicate C20 were elevated an order of magnitude by mechanical stresses at crystal-glass interface caused by thermal expansion mismatch during cooling and unique morphology (oxyapatite clustering). (C) 2016 Elsevier B.V.