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张亚锋, 何洪途, 余家欣, 廖宁. 用于ICF的三种典型光学玻璃的AFM纳米划痕行为研究[J]. 摩擦学学报, 2018, 38(3): 349-355. DOI: 10.16078/j.tribology.2018.03.013
引用本文: 张亚锋, 何洪途, 余家欣, 廖宁. 用于ICF的三种典型光学玻璃的AFM纳米划痕行为研究[J]. 摩擦学学报, 2018, 38(3): 349-355. DOI: 10.16078/j.tribology.2018.03.013
ZHANG Yafeng, HE Hongtu, YU Jiaxin, LIAO Ning. AFM Nanoscratch Behaviors of Three Optical Glasses Used in ICF[J]. TRIBOLOGY, 2018, 38(3): 349-355. DOI: 10.16078/j.tribology.2018.03.013
Citation: ZHANG Yafeng, HE Hongtu, YU Jiaxin, LIAO Ning. AFM Nanoscratch Behaviors of Three Optical Glasses Used in ICF[J]. TRIBOLOGY, 2018, 38(3): 349-355. DOI: 10.16078/j.tribology.2018.03.013

用于ICF的三种典型光学玻璃的AFM纳米划痕行为研究

AFM Nanoscratch Behaviors of Three Optical Glasses Used in ICF

  • 摘要: 本文作者通过原子力显微镜,以球形金刚石针尖作为对摩副,在大气环境下对磷酸盐激光玻璃、K9光学玻璃、熔融石英玻璃三种用于ICF系统的典型光学玻璃的纳米划痕行为进行了定量研究. 结果表明:随着载荷的增加,三种玻璃的摩擦系数均表现为先保持恒定再剧烈上升的变化趋势. 这是由于随着载荷的增加,摩擦机理由界面摩擦主导逐步转变为犁沟摩擦和界面摩擦共同主导所致. 在相同的法向载荷作用下,磷酸盐玻璃的摩擦系数最高,K9光学玻璃次之,熔融石英玻璃的摩擦系数最小,这与三种玻璃的机械性能以及它们的表面亲水性密切相关. 在相同的载荷下,磷酸盐玻璃和K9玻璃的划痕损伤表现为材料凹陷和堆积并存,而熔融石英玻璃的划痕损伤仅表现为划痕区域明显的凹陷变形. 在所有载荷下,熔融石英玻璃的划痕残余深度均略高于磷酸盐玻璃;K9玻璃在低载时的划痕深度在三种玻璃中最大,中载时居中,而高载时最小. 不同载荷下玻璃表层的机械性能、塑性流动方式以及其致密化程度都将对最终的划痕残余深度产生影响.

     

    Abstract: The nanoscratch behaviors of the phosphate laser glass, K9 optical glass and fused silica glass, used in the inertial confinement fusion system, against a spherical diamond tip were quantitatively studied by an atomic force microscopy in atmospheric environment. Results show that the friction coefficient of the three glasses kept constant first and then increased sharply with increase in normal load. It was because of the transition of friction mechanism from interfacial friction to the combined contribution of interfacial and ploughing friction. Under a same normal load, the friction coefficient of phosphate glass was largest, followed by K9 and fused silica glass. It was verified that the friction coefficient mainly depended on the mechanical properties and surface hydrophilcity of these glasses. Moreover, obvious grooves accompanied by material pile-up were observed on phosphate glass and K9 glass. However, only groove was observed on fused silica glass. Furthermore, the nanoscratch residual depth of the fused silica glass was a little larger than that of phosphate glass for all the load conditions. For the K9 glass, the residual depth of nanoscratch was deepest in the three glasses under low load but lowest under high load conditions. It can be deduced that the scratch residual depth of optical glasses was closely associated with surface mechanical properties, plastic flow and densification.

     

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