Experimental study of the surface roughness in metals with different surface finishing by two-dimensional correlation of speckle pattern

2005 ◽  
Author(s):  
Miguel Asmad ◽  
Guillermo Baldwin ◽  
Cordula Maczeyzik ◽  
Fernando Mendoza ◽  
Carlos Perez-Lopez
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Speckle Pattern ◽  
Surface Finishing ◽  
Two Dimensional

Study of the surface roughness in metals with different surface finishing by two-dimensional correlation of laser speckle pattern

2004 ◽  
Author(s):  
Miguel Asmad ◽  
Guillermo Baldwin-Olguin ◽  
C. Maczeyzik ◽  
Fernando Mendoza Santoyo ◽  
Carlos Perez-Lopez
Keyword(s):  
Surface Roughness ◽  
Speckle Pattern ◽  
Laser Speckle ◽  
Surface Finishing ◽  
Two Dimensional

scholarly journals Effect of Three Commonly Consumed Beverages on Surface Roughness of Polished and Glazed Zirconia-Reinforced Lithium Silicate Glass Ceramics

2019 ◽  
Author(s):  
Farnaz Firouz ◽  
Fariborz Vafaee ◽  
Zahra Khamverdi ◽  
Sara Khazaei ◽  
Somayeh Ghorbani Gholiabad ◽  
...  
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Orange Juice ◽  
Artificial Saliva ◽  
Glass Ceramics ◽  
Black Tea ◽  
Surface Finishing ◽  
Lithium Silicate ◽  
Control Group ◽  
Lithium Silicate Glass

Objectives: This study aimed to assess the effect of three commonly consumed beverages on surface roughness of polished and glazed zirconia-reinforced lithium silicate (ZLS) glass ceramics. Materials and Methods: In this experimental study, 104 rectangular specimens were cut from Vita Suprinity blocks with 2 mm thickness. After ultrasonic cleaning and firing of the specimens, they were finished and polished in two groups. Specimens in the first group were polished using a 2-step polishing kit while the second group specimens were glazed and heated in a porcelain firing oven according to the manufacturer’s instructions. Baseline surface roughness was measured using a profilometer. Specimens in each group were then randomly divided into 4 subgroups (n=13) for immersion in artificial saliva (control group), cola, orange juice and black tea. Surface roughness was measured again and data were analyzed using two-way ANOVA. Results: The highest and the lowest mean Ra were found in orange juice and saliva subgroups, respectively in both glazed and polished groups. The Ra values of both polished and glazed groups significantly increased after immersion in orange juice and cola (P<0.05). The polished surfaces showed insignificantly higher surface roughness compared with glazed surfaces (P>0.05). Conclusion: Orange juice and cola significantly increased the surface roughness of both polished and glazed ZLS ceramics. Type of surface finishing (polishing versus glazing) had no significant effect on the surface roughness of specimens following immersion in different beverages.

Experimental Study on the Big Nano-Ceramic Plates under Two-Dimensional Ultrasonic Polishing

2008 ◽  
Vol 392-394 ◽  
pp. 146-450 ◽  
Author(s):  
Ming Zhang ◽  
Chun Xiao Liu ◽  
Bo Zhao ◽  
Guo Fu Gao ◽  
Yu Li
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Vibration Amplitude ◽  
Alumina Ceramic ◽  
Ceramic Plate ◽  
Two Dimensional ◽  
Maximum Value ◽  
Polishing Efficiency ◽  
Zirconia Toughened Alumina

The two-dimensional ultrasonic polishing device of big nano-ceramic plate was designed and its maximum value of vibration amplitude reached 18.34um.Using it to polish the nano-zirconia toughened alumina ceramic(ZTA) plates 500mm×400mm×16mm, the polishing efficiency improves and the polishing surface roughness achieves below 0.07um, flatness below 10um.

scholarly journals Effect of Three Commonly Consumed Beverages on Surface Roughness of Polished and Glazed Zirconia-Reinforced Lithium Silicate Glass Ceramics

2019 ◽  
Author(s):  
Farnaz Firouz ◽  
Fariborz Vafaee ◽  
Zahra Khamverdi ◽  
Sara Khazaei ◽  
Somayeh Ghorbani Gholiabad ◽  
...  
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Orange Juice ◽  
Artificial Saliva ◽  
Glass Ceramics ◽  
Black Tea ◽  
Surface Finishing ◽  
Lithium Silicate ◽  
Control Group ◽  
Lithium Silicate Glass

Objectives: This study aimed to assess the effect of three commonly consumed beverages on surface roughness of polished and glazed zirconia-reinforced lithium silicate (ZLS) glass ceramics. Materials and Methods: In this experimental study, 104 rectangular specimens were cut from Vita Suprinity blocks with 2 mm thickness. After ultrasonic cleaning and firing of the specimens, they were finished and polished in two groups. Specimens in the first group were polished using a 2-step polishing kit while the second group specimens were glazed and heated in a porcelain firing oven according to the manufacturer’s instructions. Baseline surface roughness was measured using a profilometer. Specimens in each group were then randomly divided into 4 subgroups (n=13) for immersion in artificial saliva (control group), cola, orange juice and black tea. Surface roughness was measured again and data were analyzed using two-way ANOVA. Results: The highest and the lowest mean Ra were found in orange juice and saliva subgroups, respectively in both glazed and polished groups. The Ra values of both polished and glazed groups significantly increased after immersion in orange juice and cola (P<0.05). The polished surfaces showed insignificantly higher surface roughness compared with glazed surfaces (P>0.05). Conclusion: Orange juice and cola significantly increased the surface roughness of both polished and glazed ZLS ceramics. Type of surface finishing (polishing versus glazing) had no significant effect on the surface roughness of specimens following immersion in different beverages.

scholarly journals Investigation of Two-Dimensional Ultrasonic Surface Burnishing Process on 7075-T6 Aluminum

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Zhenyu Zhou ◽  
Qiuyang Zheng ◽  
Cong Ding ◽  
Guanglei Yu ◽  
Guangjian Peng ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Parameter Optimization ◽  
Wear Mechanism ◽  
Feed Rate ◽  
Sample Surface ◽  
Original Sample ◽  
Two Dimensional ◽  
Delamination Wear ◽  
Treated Sample ◽  
Burnishing Process

AbstractA novel two-dimensional ultrasonic surface burnishing process (2D-USBP) is proposed. 7075-T6 aluminum samples are processed by a custom-designed 2D-USBP setup. Parameter optimization of 2D-USBP is conducted to determine the best processing strategy of 7075-T6 aluminum. A uniform design method is utilized to optimize the 2D-USBP process. U13(133) and U7(72) tables are established to conduct parameter optimization. Burnishing depth, spindle speed, and feed rate are taken as the control parameters. The surface roughness and Vickers hardness are taken as the evaluation indicators. It establishes the active control models for surface quality. Dry wear tests are conducted to compare the wear-resistance of the 2D-USBP treated sample and the original sample. Results show that the machining quality of 2D-USBP is best under 0.24 mm burnishing depth, 5000 r/min spindle speed, and 25 mm/min feed rate. The surface roughness Sa of the sample is reduced from 2517.758 to 50.878 nm, and the hardness of the sample surface is improved from 167 to 252 HV. Under the lower load, the wear mechanism of the 2D-USBP treated sample is mainly abrasive wear accompanied by delamination wear, while the wear mechanism of the original sample is mainly delamination wear. Under the higher load, the accumulation of frictional heat on the sample surface transforms the wear mechanisms of the original and the 2D-USBP treated samples into thermal wear.

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