为改善Ni-5%W合金基带表面质量,以磷酸-硫酸和添加剂为电解液,采用均匀实验设计方法进行电解抛光,利用原子力显微镜对样品表面形貌进行表征,并用DPS(Data Process System)软件对抛光结果进行逐步回归优化。结果表明,在室温下,采用磷酸(8...为改善Ni-5%W合金基带表面质量,以磷酸-硫酸和添加剂为电解液,采用均匀实验设计方法进行电解抛光,利用原子力显微镜对样品表面形貌进行表征,并用DPS(Data Process System)软件对抛光结果进行逐步回归优化。结果表明,在室温下,采用磷酸(85%)、硫酸(98%)和有机添加剂,以体积比为4∶3∶3的抛光液抛光效果较好,抛光后基带表面均方根粗糙度在25μm×25μm范围内可降低到5nm以下。展开更多
采用硫酸–甲醇–二水合柠檬酸钠电解质溶液体系对钨进行电解抛光。抛光液中硫酸与甲醇的体积比为1∶7,二水合柠檬酸钠浓度为0.25 mol/L。改变抛光电压、温度及时间,探究了工艺参数对电解抛光钨的微观形貌和表面粗糙度的影响。用扫描电...采用硫酸–甲醇–二水合柠檬酸钠电解质溶液体系对钨进行电解抛光。抛光液中硫酸与甲醇的体积比为1∶7,二水合柠檬酸钠浓度为0.25 mol/L。改变抛光电压、温度及时间,探究了工艺参数对电解抛光钨的微观形貌和表面粗糙度的影响。用扫描电子显微镜(scanning electron microscope,SEM)和原子力显微镜(atomic force microscope,AFM)对电解抛光后的试样进行表征测试。研究结果表明,在电压、温度和时间分别为22 V、20℃和7 min时,试样具有最小的表面粗糙度和良好的表面形貌。展开更多
In this study, a series of Hastelloy tapes were electro-polished, and the dividing method was used to carry out a detailed investigation on the influence of polishing current(I) on root mean square(R_q) at various ima...In this study, a series of Hastelloy tapes were electro-polished, and the dividing method was used to carry out a detailed investigation on the influence of polishing current(I) on root mean square(R_q) at various image scales(L). The electro-polishing is found to be effective mainly at L smaller than 10μm, where the R_q–I relationship could be fitted by an exponential decay function with a residual roughness value. An approximate model of electro-polishing process was established to interpret the exponential decay function. This study provides a quantified insight into the electro-polishing process, which could help to obtain more understanding of its mechanism.展开更多
Aluminum sheets were polished to reduce ruggedness and then textured in varying acid-ethanol concentration etchant to form pores. The textured surface was characterized structurally by using X-ray diffraction (XRD) wh...Aluminum sheets were polished to reduce ruggedness and then textured in varying acid-ethanol concentration etchant to form pores. The textured surface was characterized structurally by using X-ray diffraction (XRD) which revealed aluminum crystallographic planes (1 1 1), (2 0 0), (2 2 0) and (3 1 1). Its morphology was studied by using energy dispersive X-ray (EDX) and scanning electron microscope (SEM) that confirmed purity of aluminum sheet to be 99.66% at. Reflectance of textured and plain aluminum sheet was analyzed by spectrophotometric measurements which showed that texturing reduced the reflectance of the polished surface by 26% in the UV-VIS-NIR spectrum of solar radiation. With reduced reflectance of the textured aluminum sheet, it was applicable for solar radiation absorption.展开更多
文摘为改善Ni-5%W合金基带表面质量,以磷酸-硫酸和添加剂为电解液,采用均匀实验设计方法进行电解抛光,利用原子力显微镜对样品表面形貌进行表征,并用DPS(Data Process System)软件对抛光结果进行逐步回归优化。结果表明,在室温下,采用磷酸(85%)、硫酸(98%)和有机添加剂,以体积比为4∶3∶3的抛光液抛光效果较好,抛光后基带表面均方根粗糙度在25μm×25μm范围内可降低到5nm以下。
文摘采用硫酸–甲醇–二水合柠檬酸钠电解质溶液体系对钨进行电解抛光。抛光液中硫酸与甲醇的体积比为1∶7,二水合柠檬酸钠浓度为0.25 mol/L。改变抛光电压、温度及时间,探究了工艺参数对电解抛光钨的微观形貌和表面粗糙度的影响。用扫描电子显微镜(scanning electron microscope,SEM)和原子力显微镜(atomic force microscope,AFM)对电解抛光后的试样进行表征测试。研究结果表明,在电压、温度和时间分别为22 V、20℃和7 min时,试样具有最小的表面粗糙度和良好的表面形貌。
基金financially supported by the National Natural Science Foundation of China (No. 51475257)the Fundamental Research Program of Shenzhen (No. JCYJ20170307152319957)the Tribology Science Fund of State Key Laboratory of Tribology, China (No. SKLT2016B02)
文摘In this study, a series of Hastelloy tapes were electro-polished, and the dividing method was used to carry out a detailed investigation on the influence of polishing current(I) on root mean square(R_q) at various image scales(L). The electro-polishing is found to be effective mainly at L smaller than 10μm, where the R_q–I relationship could be fitted by an exponential decay function with a residual roughness value. An approximate model of electro-polishing process was established to interpret the exponential decay function. This study provides a quantified insight into the electro-polishing process, which could help to obtain more understanding of its mechanism.
文摘Aluminum sheets were polished to reduce ruggedness and then textured in varying acid-ethanol concentration etchant to form pores. The textured surface was characterized structurally by using X-ray diffraction (XRD) which revealed aluminum crystallographic planes (1 1 1), (2 0 0), (2 2 0) and (3 1 1). Its morphology was studied by using energy dispersive X-ray (EDX) and scanning electron microscope (SEM) that confirmed purity of aluminum sheet to be 99.66% at. Reflectance of textured and plain aluminum sheet was analyzed by spectrophotometric measurements which showed that texturing reduced the reflectance of the polished surface by 26% in the UV-VIS-NIR spectrum of solar radiation. With reduced reflectance of the textured aluminum sheet, it was applicable for solar radiation absorption.
