The Experts below are selected from a list of 228 Experts worldwide ranked by ideXlab platform

Quanli Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Diamond wheel wear mechanism and its impact on the surface generation in parallel Diamond grinding of rb sic si
    Diamond and Related Materials, 2017
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Wenjie Zhai
    Abstract:

    Abstract The Diamond wheel wear mechanism and its impact on the surface generation of RB-SiC/Si carbide under parallel grinding were investigated. The machined surface was mainly characterized by surface fracture and Diamond Grits scratched plastic grooves, and the surface finish of the machined RB-SiC/Si improved with decreasing feed rate. But the non-uniform surface appeared due to the varied material removal rate at different radial position for a certain workpiece. Both macro- and micro-wheel wear occurred during grinding, and the macro-wheel wear appeared in the form of profile deviation and rapid loss of sharp edge, which contributed to the appearance of cone shape at the center of workpiece. Power spectrum analysis by Fast Fourier Transformation (FFT) confirmed the significant influence of micro-wheel wear on surface generation, which involved random Diamond Grit splintering, abrasive flattening, grain dislodgement and graphitization.

  • impact of material microstructure and Diamond Grit wear on surface finish in micro grinding of rb sic si and wc co carbides
    International Journal of Refractory Metals & Hard Materials, 2015
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Guoqing Zhang
    Abstract:

    Abstract Ultra-precision surface grinding experiments were conducted at two different grinding conditions (rough and fine) to study the surface finish of RB-SiC/Si and WC/Co carbides, with Si and Co as binders, respectively. It was found that RB-SiC/Si and WC/Co showed two different types of surface generation mechanism under the same selected grinding conditions: brittle fractured surface of RB-SiC/Si and plastic deformation surface of WC/Co. Obvious micro-breaks occurred on SiC surface with a coarse Grit wheel at higher material removal rate, but it changed to micro-pits at the phase boundary with a fine Grit wheel at a lower material removal rate. Nevertheless, the surface characteristic only changed from rough grinding traces to finer for WC/Co. It was found that the surface finish of RB-SiC/Si and WC/Co was closely related to the material brittleness. The surface roughness (Ra) of RB-SiC/Si was limited to be about 20 nm under both rough and fine grinding conditions while about 5 nm (Ra) could be achieved for WC/Co under the fine condition. It was also identified that the surface profile of workpieces was replicated from Diamond Grits. To explain the difference in wavy surface profile at nanoscale, a simple model was built to illustrate the impact of Grit wear.

Qing Liang Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Diamond wheel wear mechanism and its impact on the surface generation in parallel Diamond grinding of rb sic si
    Diamond and Related Materials, 2017
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Wenjie Zhai
    Abstract:

    Abstract The Diamond wheel wear mechanism and its impact on the surface generation of RB-SiC/Si carbide under parallel grinding were investigated. The machined surface was mainly characterized by surface fracture and Diamond Grits scratched plastic grooves, and the surface finish of the machined RB-SiC/Si improved with decreasing feed rate. But the non-uniform surface appeared due to the varied material removal rate at different radial position for a certain workpiece. Both macro- and micro-wheel wear occurred during grinding, and the macro-wheel wear appeared in the form of profile deviation and rapid loss of sharp edge, which contributed to the appearance of cone shape at the center of workpiece. Power spectrum analysis by Fast Fourier Transformation (FFT) confirmed the significant influence of micro-wheel wear on surface generation, which involved random Diamond Grit splintering, abrasive flattening, grain dislodgement and graphitization.

  • impact of material microstructure and Diamond Grit wear on surface finish in micro grinding of rb sic si and wc co carbides
    International Journal of Refractory Metals & Hard Materials, 2015
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Guoqing Zhang
    Abstract:

    Abstract Ultra-precision surface grinding experiments were conducted at two different grinding conditions (rough and fine) to study the surface finish of RB-SiC/Si and WC/Co carbides, with Si and Co as binders, respectively. It was found that RB-SiC/Si and WC/Co showed two different types of surface generation mechanism under the same selected grinding conditions: brittle fractured surface of RB-SiC/Si and plastic deformation surface of WC/Co. Obvious micro-breaks occurred on SiC surface with a coarse Grit wheel at higher material removal rate, but it changed to micro-pits at the phase boundary with a fine Grit wheel at a lower material removal rate. Nevertheless, the surface characteristic only changed from rough grinding traces to finer for WC/Co. It was found that the surface finish of RB-SiC/Si and WC/Co was closely related to the material brittleness. The surface roughness (Ra) of RB-SiC/Si was limited to be about 20 nm under both rough and fine grinding conditions while about 5 nm (Ra) could be achieved for WC/Co under the fine condition. It was also identified that the surface profile of workpieces was replicated from Diamond Grits. To explain the difference in wavy surface profile at nanoscale, a simple model was built to illustrate the impact of Grit wear.

  • single Grit scratching and Diamond grinding on optical glasses
    Key Engineering Materials, 2011
    Co-Authors: Qing Liang Zhao, Liang Zhao, Bin Qiang Guo
    Abstract:

    Based on the single Diamond Grit scratching and normal grinding assisted with ELID (Electrolytic in Process Dressing), the surface/subsurface inteGrity of machined spectrosil 2000 and BK7 glasses under various material removal modes have been investigated. In Single Diamond Grit scratching tests, the scratching traces display four kinds of scratch characteristics according to different material removal modes. In the Diamond normal grinding, the surface/subsurface inteGrity analysis shows BK7 glass has a better machinability than that of spectrosil 2000. Moreover, with the increasing ae(depth of cut), these two kinds of glasses had the opposite variation trends about the Ra values and the force ratio, which is attributed to various material removal modes. While contrasting these two kinds of optical glasses ground under the same ae parameters, the smaller grinding force and grinding force ratio (Fn/Ft), as well as the more stable force curves correspond to a better surface quality.

Bing Guo - One of the best experts on this subject based on the ideXlab platform.

  • Diamond wheel wear mechanism and its impact on the surface generation in parallel Diamond grinding of rb sic si
    Diamond and Related Materials, 2017
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Wenjie Zhai
    Abstract:

    Abstract The Diamond wheel wear mechanism and its impact on the surface generation of RB-SiC/Si carbide under parallel grinding were investigated. The machined surface was mainly characterized by surface fracture and Diamond Grits scratched plastic grooves, and the surface finish of the machined RB-SiC/Si improved with decreasing feed rate. But the non-uniform surface appeared due to the varied material removal rate at different radial position for a certain workpiece. Both macro- and micro-wheel wear occurred during grinding, and the macro-wheel wear appeared in the form of profile deviation and rapid loss of sharp edge, which contributed to the appearance of cone shape at the center of workpiece. Power spectrum analysis by Fast Fourier Transformation (FFT) confirmed the significant influence of micro-wheel wear on surface generation, which involved random Diamond Grit splintering, abrasive flattening, grain dislodgement and graphitization.

  • impact of material microstructure and Diamond Grit wear on surface finish in micro grinding of rb sic si and wc co carbides
    International Journal of Refractory Metals & Hard Materials, 2015
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Guoqing Zhang
    Abstract:

    Abstract Ultra-precision surface grinding experiments were conducted at two different grinding conditions (rough and fine) to study the surface finish of RB-SiC/Si and WC/Co carbides, with Si and Co as binders, respectively. It was found that RB-SiC/Si and WC/Co showed two different types of surface generation mechanism under the same selected grinding conditions: brittle fractured surface of RB-SiC/Si and plastic deformation surface of WC/Co. Obvious micro-breaks occurred on SiC surface with a coarse Grit wheel at higher material removal rate, but it changed to micro-pits at the phase boundary with a fine Grit wheel at a lower material removal rate. Nevertheless, the surface characteristic only changed from rough grinding traces to finer for WC/Co. It was found that the surface finish of RB-SiC/Si and WC/Co was closely related to the material brittleness. The surface roughness (Ra) of RB-SiC/Si was limited to be about 20 nm under both rough and fine grinding conditions while about 5 nm (Ra) could be achieved for WC/Co under the fine condition. It was also identified that the surface profile of workpieces was replicated from Diamond Grits. To explain the difference in wavy surface profile at nanoscale, a simple model was built to illustrate the impact of Grit wear.

Guoqing Zhang - One of the best experts on this subject based on the ideXlab platform.

  • impact of material microstructure and Diamond Grit wear on surface finish in micro grinding of rb sic si and wc co carbides
    International Journal of Refractory Metals & Hard Materials, 2015
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Guoqing Zhang
    Abstract:

    Abstract Ultra-precision surface grinding experiments were conducted at two different grinding conditions (rough and fine) to study the surface finish of RB-SiC/Si and WC/Co carbides, with Si and Co as binders, respectively. It was found that RB-SiC/Si and WC/Co showed two different types of surface generation mechanism under the same selected grinding conditions: brittle fractured surface of RB-SiC/Si and plastic deformation surface of WC/Co. Obvious micro-breaks occurred on SiC surface with a coarse Grit wheel at higher material removal rate, but it changed to micro-pits at the phase boundary with a fine Grit wheel at a lower material removal rate. Nevertheless, the surface characteristic only changed from rough grinding traces to finer for WC/Co. It was found that the surface finish of RB-SiC/Si and WC/Co was closely related to the material brittleness. The surface roughness (Ra) of RB-SiC/Si was limited to be about 20 nm under both rough and fine grinding conditions while about 5 nm (Ra) could be achieved for WC/Co under the fine condition. It was also identified that the surface profile of workpieces was replicated from Diamond Grits. To explain the difference in wavy surface profile at nanoscale, a simple model was built to illustrate the impact of Grit wear.

Wenjie Zhai - One of the best experts on this subject based on the ideXlab platform.

  • Diamond wheel wear mechanism and its impact on the surface generation in parallel Diamond grinding of rb sic si
    Diamond and Related Materials, 2017
    Co-Authors: Qing Liang Zhao, Quanli Zhang, Bing Guo, Wenjie Zhai
    Abstract:

    Abstract The Diamond wheel wear mechanism and its impact on the surface generation of RB-SiC/Si carbide under parallel grinding were investigated. The machined surface was mainly characterized by surface fracture and Diamond Grits scratched plastic grooves, and the surface finish of the machined RB-SiC/Si improved with decreasing feed rate. But the non-uniform surface appeared due to the varied material removal rate at different radial position for a certain workpiece. Both macro- and micro-wheel wear occurred during grinding, and the macro-wheel wear appeared in the form of profile deviation and rapid loss of sharp edge, which contributed to the appearance of cone shape at the center of workpiece. Power spectrum analysis by Fast Fourier Transformation (FFT) confirmed the significant influence of micro-wheel wear on surface generation, which involved random Diamond Grit splintering, abrasive flattening, grain dislodgement and graphitization.