Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018324
Jinkai Li, Wenzhi Wang, Z. Liu
The (Gd1−xTbx)AlO3 (x = 0-0.12) were obtained through ammonium bicarbonate co-precipitation technology. The pure-phase (Gd1−xTbx)AlO3 with good dispersion could be obtained at relatively lower temperature of 1,000°C. Under optimum UV excitation into 275 nm, the photoluminescence (PL) spectra display a series of 5D4−7FJ transitions of Tb3+ in (Gd1−xTbx)AlO3 system with the strongest green emission at ~546 nm. The overlapping between 8S7/2−6IJ intra f-f transition of Gd3+ and 4f8-4f75d1 transition of Tb3+ at 275 nm suggesting the Gd3+ → Tb3+ energy transfer, and the quenching contents of Tb3+ was found to be ~10 at%. The luminescent property of GdAlO3:Tb3+ phosphor could be further improved with molten salt incorporation. The optimal composition of molten salts was determined to be the mixture of NaCl/Na2SO4 (5 wt% NaCl), and the mass ratio of mixture molten salts to precursor was 2:1. The relationship between the luminescent property and molten salts composition were studied in detail.
{"title":"The luminescent properties of GdAlO3:Tb3+ phosphors based on molten salts addition","authors":"Jinkai Li, Wenzhi Wang, Z. Liu","doi":"10.1504/IJNM.2019.10018324","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018324","url":null,"abstract":"The (Gd1−xTbx)AlO3 (x = 0-0.12) were obtained through ammonium bicarbonate co-precipitation technology. The pure-phase (Gd1−xTbx)AlO3 with good dispersion could be obtained at relatively lower temperature of 1,000°C. Under optimum UV excitation into 275 nm, the photoluminescence (PL) spectra display a series of 5D4−7FJ transitions of Tb3+ in (Gd1−xTbx)AlO3 system with the strongest green emission at ~546 nm. The overlapping between 8S7/2−6IJ intra f-f transition of Gd3+ and 4f8-4f75d1 transition of Tb3+ at 275 nm suggesting the Gd3+ → Tb3+ energy transfer, and the quenching contents of Tb3+ was found to be ~10 at%. The luminescent property of GdAlO3:Tb3+ phosphor could be further improved with molten salt incorporation. The optimal composition of molten salts was determined to be the mixture of NaCl/Na2SO4 (5 wt% NaCl), and the mass ratio of mixture molten salts to precursor was 2:1. The relationship between the luminescent property and molten salts composition were studied in detail.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42561819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018335
H. Chen, Zhuangzhi Zhao, Peirong Qi, Gang Wang, Lei Shi, Feng Yu
Agricultural waste banana peel (BP) as a sustainable biomass resource is used to produce porous carbon (PC) and activated carbon (AC) materials. Sulphur-doped banana peel-derived AC (S-BP-AC) was successfully prepared for supercapacitors. The results show that the S-BP-AC presents a high Brunauer-Emmett-Teller surface area of 2,224.9 m2/g, a large pore volume of 0.77 cm3/g, and a suitable pore-size distribution of approximately 0.8 nm. It is easy to bring S-BP-AC into contact with an electrolyte. The S-BP-AC electrode had great specific capacitance of 162.5 F/g at a current density of 0.5 A/g in a 6 M KOH aqueous electrolyte. The results indicate that the S-BP-AC can be applied to use in high performance supercapacitors.
农业废弃香蕉皮(BP)作为一种可持续的生物质资源，用于生产多孔炭(PC)和活性炭(AC)材料。成功制备了含硫香蕉皮衍生AC (S-BP-AC)超级电容器。结果表明，S-BP-AC具有22224.9 m2/g的高brunauer - emmet - teller表面积，0.77 cm3/g的大孔体积，孔径分布约为0.8 nm。很容易使S-BP-AC与电解质接触。在6 M KOH水溶液中，当电流密度为0.5 a /g时，S-BP-AC电极的比电容达到162.5 F/g。结果表明，S-BP-AC可用于高性能超级电容器。
{"title":"Sulphur-doped banana peel-derived activated carbon as electrode materials for supercapacitors","authors":"H. Chen, Zhuangzhi Zhao, Peirong Qi, Gang Wang, Lei Shi, Feng Yu","doi":"10.1504/IJNM.2019.10018335","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018335","url":null,"abstract":"Agricultural waste banana peel (BP) as a sustainable biomass resource is used to produce porous carbon (PC) and activated carbon (AC) materials. Sulphur-doped banana peel-derived AC (S-BP-AC) was successfully prepared for supercapacitors. The results show that the S-BP-AC presents a high Brunauer-Emmett-Teller surface area of 2,224.9 m2/g, a large pore volume of 0.77 cm3/g, and a suitable pore-size distribution of approximately 0.8 nm. It is easy to bring S-BP-AC into contact with an electrolyte. The S-BP-AC electrode had great specific capacitance of 162.5 F/g at a current density of 0.5 A/g in a 6 M KOH aqueous electrolyte. The results indicate that the S-BP-AC can be applied to use in high performance supercapacitors.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47662070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018329
Qingbin Zhu, Jinghao Liu, Y. Zhong, Guicun Li
Sn nanoparticles encapsulated in hierarchical porous carbon networks ([email protected]) have been synthesised by the carbothermal reduction reaction of sodium stannate-crosslinked sodium polyacrylate xerogel. The synthetic strategy is simple and effective for the scalable production of [email protected] The [email protected] show homogeneous distribution of Sn nanoparticles within hierarchical porous conductive carbon matrix. The obtained [email protected] exhibit high reversible discharge capacity (1,652.1 mAh g−1 at 0.1 A g−1), superior rate performance (499.7 mAh g−1 at 2 A g−1), and excellent cycling stability (553.0 mA h g−1 at 1.5 A g−1 after 150 cycles). The superior lithium storage performances of the [email protected] are due to uniform distribution of Sn nanoparticles within hierarchical porous conductive carbon network, which could not only provide a conductive matrix, but also buffer huge volume change caused by lithiation and thus guarantee integrity of the [email protected] structure.
通过锡酸钠交联聚丙烯酸钠干凝胶的碳热还原反应，合成了包封在分级多孔碳网络中的Sn纳米颗粒（〔email protected〕）。该合成策略简单有效，可用于[电子邮件保护]的可扩展生产。[电子邮件保护]Sn纳米颗粒在分级多孔导电碳基体中均匀分布。所获得的[电子邮件保护]表现出高的可逆放电容量（在0.1 A g−1下为1652.1 mAh g−1）、优异的倍率性能（在2 A g−2下为499.7 mAh g–1）和优异的循环稳定性（150次循环后在1.5 A g−1.5下为553.0 mA h g−2）。〔email protected〕优异的储锂性能是由于Sn纳米颗粒在分级多孔导电碳网络中的均匀分布，这不仅可以提供导电基体，还可以缓冲锂化引起的巨大体积变化，从而保证〔email protective〕结构的完整性。
{"title":"Scalable synthesis of Sn nanoparticles encapsulated in hierarchical porous carbon networks for high-rate reversible lithium storage","authors":"Qingbin Zhu, Jinghao Liu, Y. Zhong, Guicun Li","doi":"10.1504/IJNM.2019.10018329","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018329","url":null,"abstract":"Sn nanoparticles encapsulated in hierarchical porous carbon networks ([email protected]) have been synthesised by the carbothermal reduction reaction of sodium stannate-crosslinked sodium polyacrylate xerogel. The synthetic strategy is simple and effective for the scalable production of [email protected] The [email protected] show homogeneous distribution of Sn nanoparticles within hierarchical porous conductive carbon matrix. The obtained [email protected] exhibit high reversible discharge capacity (1,652.1 mAh g−1 at 0.1 A g−1), superior rate performance (499.7 mAh g−1 at 2 A g−1), and excellent cycling stability (553.0 mA h g−1 at 1.5 A g−1 after 150 cycles). The superior lithium storage performances of the [email protected] are due to uniform distribution of Sn nanoparticles within hierarchical porous conductive carbon network, which could not only provide a conductive matrix, but also buffer huge volume change caused by lithiation and thus guarantee integrity of the [email protected] structure.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43252272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10014399
Suyu Shi, Linan Wang, K. Zhao, Chuntai Liu, G. Zheng
In this study, a bipolar membrane (BPM) of sodium alginate (SA) and chitosan (CS) was prepared based on carboxyl multi-walled carbon nanotubes (cMWCNTs). To improve the compatibility of anion-exchange layer and cation-exchange layer, polyvinyl alcohol (PVA) was blended with both the SA and CS, respectively. A casting method was employed to prepare the modified BPM named as cMWCNTs-mSA/mCS BPM for simplicity. The morphology, thermal and structure stability, electrochemical properties and ion penetrability of the BPM were characterised. Scanning electron microscopy (SEM) images illustrate a structure consisting of two distinct layers that are closely combined with each other. Thermal gravimetric (TG) results indicate that the thermal stability of cMWCNTs-mSA/mCS BPM is significantly improved. Swelling behaviour implies a proper hydrophilic performance and excellent structure stability in alkali solution. Compared with SA/CS BPM, the working voltage of cMWCNTs-mSA/mCS BPM is decreased sharply. Furthermore, the cMWCNTs-mSA/mCS BPM exhibited higher ion penetrability which is beneficial for electrochemical synthesis.
{"title":"Preparation and characterization of cMWCNTs-mSA/mCS bipolar membrane for electrochemical synthesis","authors":"Suyu Shi, Linan Wang, K. Zhao, Chuntai Liu, G. Zheng","doi":"10.1504/IJNM.2019.10014399","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10014399","url":null,"abstract":"In this study, a bipolar membrane (BPM) of sodium alginate (SA) and chitosan (CS) was prepared based on carboxyl multi-walled carbon nanotubes (cMWCNTs). To improve the compatibility of anion-exchange layer and cation-exchange layer, polyvinyl alcohol (PVA) was blended with both the SA and CS, respectively. A casting method was employed to prepare the modified BPM named as cMWCNTs-mSA/mCS BPM for simplicity. The morphology, thermal and structure stability, electrochemical properties and ion penetrability of the BPM were characterised. Scanning electron microscopy (SEM) images illustrate a structure consisting of two distinct layers that are closely combined with each other. Thermal gravimetric (TG) results indicate that the thermal stability of cMWCNTs-mSA/mCS BPM is significantly improved. Swelling behaviour implies a proper hydrophilic performance and excellent structure stability in alkali solution. Compared with SA/CS BPM, the working voltage of cMWCNTs-mSA/mCS BPM is decreased sharply. Furthermore, the cMWCNTs-mSA/mCS BPM exhibited higher ion penetrability which is beneficial for electrochemical synthesis.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48312169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-04DOI: 10.1504/IJNM.2018.10016340
B. Fang, Chonghai Xu, G. Xiao
A computer simulation coupled with fabrication parameters for the sintering process of two-phase ceramic tool materials has been developed using a two-dimensional hexagon lattice model mapped from ...
利用二维六边形晶格模型，结合制备参数，对两相陶瓷工具材料的烧结过程进行了计算机模拟。。。
{"title":"Simulation of microstructure evolution coupled with fabrication parameters for two-phase ceramic tool materials","authors":"B. Fang, Chonghai Xu, G. Xiao","doi":"10.1504/IJNM.2018.10016340","DOIUrl":"https://doi.org/10.1504/IJNM.2018.10016340","url":null,"abstract":"A computer simulation coupled with fabrication parameters for the sintering process of two-phase ceramic tool materials has been developed using a two-dimensional hexagon lattice model mapped from ...","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":"14 1","pages":"301"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41613496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-04DOI: 10.1504/IJNM.2018.10016347
Xiaohong Lu, Hua Wang, Zhenyuan Jia, Yixuan Feng, S. Liang
Inconel 718 is a kind of typical difficult-to-machine material. Micro-milling technology is an effective method for fabricating micro parts of Inconel 718. The change rules of micro-milling temperature differ from those of the traditional processing, which will affect the surface integrity of the workpiece and the tool life of the micro-milling cutter in different ways. To ascertain the effects of cutting parameters on cutting temperature during micro-milling Inconel 718 and achieve the prediction of cutting temperature, some micro-milling experiments are conducted based on the response surface method. The independent and interaction effects of the spindle speed, feed per tooth and axial cutting depth on cutting temperature are investigated. A micro-milling temperature prediction model is established based on the experiment results. The maximum prediction error is 5.3% and the average prediction error is 2.6%. Finally, the accuracy of the proposed model is validated through experiments of micro-milling Inconel 718.
{"title":"Effects of cutting parameters on temperature and temperature prediction in micro-milling of Inconel 718","authors":"Xiaohong Lu, Hua Wang, Zhenyuan Jia, Yixuan Feng, S. Liang","doi":"10.1504/IJNM.2018.10016347","DOIUrl":"https://doi.org/10.1504/IJNM.2018.10016347","url":null,"abstract":"Inconel 718 is a kind of typical difficult-to-machine material. Micro-milling technology is an effective method for fabricating micro parts of Inconel 718. The change rules of micro-milling temperature differ from those of the traditional processing, which will affect the surface integrity of the workpiece and the tool life of the micro-milling cutter in different ways. To ascertain the effects of cutting parameters on cutting temperature during micro-milling Inconel 718 and achieve the prediction of cutting temperature, some micro-milling experiments are conducted based on the response surface method. The independent and interaction effects of the spindle speed, feed per tooth and axial cutting depth on cutting temperature are investigated. A micro-milling temperature prediction model is established based on the experiment results. The maximum prediction error is 5.3% and the average prediction error is 2.6%. Finally, the accuracy of the proposed model is validated through experiments of micro-milling Inconel 718.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":"14 1","pages":"377"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47410664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-04DOI: 10.1504/IJNM.2018.10016344
Dong Yuan, Lin Xianyu, L. Yanguo, Guofu Zhou, Li Nan
Surface structure modification is an effective way to enhance light extraction of LED, which is limited by total internal reflection on the interfacial surface. The periodic surface structure manufactured by micromachining was proved to be a feasible way to enhance the light extraction efficiency (LEE) of LEDs. In order to obtain the highest LEE, need to optimise the structural parameters. In this paper, a simplified ray tracing optical model was built to find out a high performance microstructure parameters by simulation. Then, a mathematical model was built to further optimise the optical simulation results, obtained the optimal microstructure parameters for LEE. The performance of optimal microstructure was also studied by optical simulation.
{"title":"Surface microstructure parameter optimisation for enhancing light extraction efficiency of LED","authors":"Dong Yuan, Lin Xianyu, L. Yanguo, Guofu Zhou, Li Nan","doi":"10.1504/IJNM.2018.10016344","DOIUrl":"https://doi.org/10.1504/IJNM.2018.10016344","url":null,"abstract":"Surface structure modification is an effective way to enhance light extraction of LED, which is limited by total internal reflection on the interfacial surface. The periodic surface structure manufactured by micromachining was proved to be a feasible way to enhance the light extraction efficiency (LEE) of LEDs. In order to obtain the highest LEE, need to optimise the structural parameters. In this paper, a simplified ray tracing optical model was built to find out a high performance microstructure parameters by simulation. Then, a mathematical model was built to further optimise the optical simulation results, obtained the optimal microstructure parameters for LEE. The performance of optimal microstructure was also studied by optical simulation.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":"14 1","pages":"342"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44953238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to investigate the material removal mechanism in vertical ultrasonic assisted grinding (VUAG) of ceramics, single-grit impact simulation is performed by using smoothed particle hydrodynamics (SPH) method. The initiation and propagation of cracks in grinding of Al2O3 ceramics are analysed. In this simulation, the grit is modelled as a rectangular pyramid diamond indenter and the process of grit impacting on workpiece under different impact speeds is simulated. The critical depth of initiation and propagation of lateral crack is observed. The results show that within a certain range of impact speed, the critical depth of lateral crack decreases with the increasing of impact speed. This means that the brittle fractures are more prone to occur in VUAG. Considering that the material micro-fracture is the main mode in ceramics material grinding under ordinary processing conditions, the material removal rate in VUAG can be improved. Moreover, by observing the surface topography, it can be found that the surface roughness becomes smaller when the impact speed increases.
{"title":"Effect of single grit impacts on initiation and propagation of cracks in ultrasonic assisted grinding of ceramics by using SPH method","authors":"Zhiqiang Liang, Meng Tian, Q. Wang, Xibin Wang, Tianfeng Zhou, L. Jiao, Yongbo Wu","doi":"10.1504/IJNM.2018.10016346","DOIUrl":"https://doi.org/10.1504/IJNM.2018.10016346","url":null,"abstract":"In order to investigate the material removal mechanism in vertical ultrasonic assisted grinding (VUAG) of ceramics, single-grit impact simulation is performed by using smoothed particle hydrodynamics (SPH) method. The initiation and propagation of cracks in grinding of Al2O3 ceramics are analysed. In this simulation, the grit is modelled as a rectangular pyramid diamond indenter and the process of grit impacting on workpiece under different impact speeds is simulated. The critical depth of initiation and propagation of lateral crack is observed. The results show that within a certain range of impact speed, the critical depth of lateral crack decreases with the increasing of impact speed. This means that the brittle fractures are more prone to occur in VUAG. Considering that the material micro-fracture is the main mode in ceramics material grinding under ordinary processing conditions, the material removal rate in VUAG can be improved. Moreover, by observing the surface topography, it can be found that the surface roughness becomes smaller when the impact speed increases.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":"14 1","pages":"387"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49312405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-04DOI: 10.1504/IJNM.2018.10016343
Mingjin Xu, Yi-fan Dai, Xuhui Xie, Lin Zhou
High-precision off-axis aspheric components are widely applied in various high-performance optical systems. However, the complicated manufacturing features of off-axis aspheric make it difficult to achieve high-precision surface for traditional optical manufacturing methods. Ion beam figuring (IBF) is a non-contact and highly deterministic method for the final precision optical figuring. In this paper, two different machining position-attitude models are discussed, which have great influence on the machining difficulty and figuring accuracy of IBF. The child mirror coordinate position-attitude model (CCPAM), which is based on the robustness of IBF removal function to small disturbance of target distance and incidence angle, can effectively decrease the sag height and incidence angle, thereby reduce the beam errors and machining difficulty. A linear three-axis IBF system is successfully applied for the figuring of a large-aperture parabolic off-axis aspheric mirror based on the CCPAM and its best-fit sphere. With two iterations of 113 min, surface error is down to 7.658 nm RMS (effective aperture 310 mm × 310 mm). The figuring results indicate IBF can realise the rapid fabrication of high-precision off-axis aspheric based on the machining position-attitude optimisation.
{"title":"Machining position-attitude optimisation in ion beam figuring of high-precision off-axis aspheric surfaces","authors":"Mingjin Xu, Yi-fan Dai, Xuhui Xie, Lin Zhou","doi":"10.1504/IJNM.2018.10016343","DOIUrl":"https://doi.org/10.1504/IJNM.2018.10016343","url":null,"abstract":"High-precision off-axis aspheric components are widely applied in various high-performance optical systems. However, the complicated manufacturing features of off-axis aspheric make it difficult to achieve high-precision surface for traditional optical manufacturing methods. Ion beam figuring (IBF) is a non-contact and highly deterministic method for the final precision optical figuring. In this paper, two different machining position-attitude models are discussed, which have great influence on the machining difficulty and figuring accuracy of IBF. The child mirror coordinate position-attitude model (CCPAM), which is based on the robustness of IBF removal function to small disturbance of target distance and incidence angle, can effectively decrease the sag height and incidence angle, thereby reduce the beam errors and machining difficulty. A linear three-axis IBF system is successfully applied for the figuring of a large-aperture parabolic off-axis aspheric mirror based on the CCPAM and its best-fit sphere. With two iterations of 113 min, surface error is down to 7.658 nm RMS (effective aperture 310 mm × 310 mm). The figuring results indicate IBF can realise the rapid fabrication of high-precision off-axis aspheric based on the machining position-attitude optimisation.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":"14 1","pages":"332"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41625436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-04DOI: 10.1504/IJNM.2018.10012496
Zhong Meipeng, J. Yuan, W. Yao, Chen Zhixiang, Zhongdian Chen
Ultrasonic horns are also called ultrasonic shift levers. They magnify ultrasonic vibration amplitude to meet the requirements of ultrasonic machining. To improve the efficiency of ultrasonic grinding, reduce the connecting parts of the lever, and reduce internal stress, the amplitude of the ultrasonic vibration process is defined in this study. The amplitude of the stress and modal simulation was determined using ANSYS was used as the simulation system for ultrasonic horn deformation. The stress and displacement at the end of the ultrasonic horns are the highest; however, the displacement at the node position of the flange is almost zero. The maximum displacement is 14.893 µm, and the minimum displacement is close to zero. Ultrasonic horns in ultrasonic vibration machining meet the requirements of use. It is proved in theory that the performance of the ultrasonic system is reliable and the design is reasonable.
{"title":"Design and simulation of ultrasonic horns in ultrasonic vibration machining","authors":"Zhong Meipeng, J. Yuan, W. Yao, Chen Zhixiang, Zhongdian Chen","doi":"10.1504/IJNM.2018.10012496","DOIUrl":"https://doi.org/10.1504/IJNM.2018.10012496","url":null,"abstract":"Ultrasonic horns are also called ultrasonic shift levers. They magnify ultrasonic vibration amplitude to meet the requirements of ultrasonic machining. To improve the efficiency of ultrasonic grinding, reduce the connecting parts of the lever, and reduce internal stress, the amplitude of the ultrasonic vibration process is defined in this study. The amplitude of the stress and modal simulation was determined using ANSYS was used as the simulation system for ultrasonic horn deformation. The stress and displacement at the end of the ultrasonic horns are the highest; however, the displacement at the node position of the flange is almost zero. The maximum displacement is 14.893 µm, and the minimum displacement is close to zero. Ultrasonic horns in ultrasonic vibration machining meet the requirements of use. It is proved in theory that the performance of the ultrasonic system is reliable and the design is reasonable.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":"14 1","pages":"397"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47502492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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