Experimental study on micro-abrasion behavior of hard coatings: the role of load, sliding distance and abrasive particle size

The effects of abrasive particle size on polishing phenomena during wafer planarization are investigated using a high precision polishing process test bench with in-situ measurement technology. The present experimental results are found to be comported with the experimental and theoretical data published previously. The current experimental outcomes can help to understand the polishing mechanism and develop the relating theoretical model.

Download Full-text

Research on Ultra Precision Mirror Machining Technology for Aluminum Alloy Mobile Phone Shell

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.797.385 ◽

2013 ◽

Vol 797 ◽

pp. 385-389

Author(s):

Jia Liang Guan ◽

Xiao Hui Zhang ◽

Xin Qiang Ma ◽

Zhi Wei Wang ◽

Li Li Zhu

Keyword(s):

Experimental Study ◽

Surface Roughness ◽

Particle Size ◽

Aluminum Alloy ◽

Mobile Phone ◽

Surface Quality ◽

Abrasive Particle ◽

Ultra Precision ◽

Main Factors ◽

Polishing Pressure

In this paper, the ultra-precision mirror polishing technology was adopted for mirror processing experimental study of Aluminum Alloy mobile phone shell. The experiments show that: polishing pressure, Grinding disc speed, the texture and hardness of polishing pad and abrasive particle size are the main factors to affect the surface quality. Through to optimize these parameters matching combination, can effectively improve the surface quality and reduce the surface roughness and obtain surface roughness is Ra0.026μm.

Download Full-text

The role of abrasive particle size on erosion characteristics of stainless steel

Engineering Failure Analysis ◽

10.1016/j.engfailanal.2019.01.020 ◽

2019 ◽

Vol 97 ◽

pp. 844-853 ◽

Cited By ~ 4

Author(s):

Q.B. Nguyen ◽

D.N. Nguyen ◽

R. Murray ◽

N.X. Ca ◽

C.Y.H. Lim ◽

...

Keyword(s):

Particle Size ◽

Stainless Steel ◽

Abrasive Particle

Download Full-text

Experimental Study on Ultrasonic Grinding of Nano-ZrO2 Ceramics by Single-Grit

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.217 ◽

2012 ◽

Vol 217-219 ◽

pp. 217-220

Author(s):

Ming Li Zhao ◽

Bo Zhao

Keyword(s):

Experimental Study ◽

Plastic Deformation ◽

Abrasive Particle ◽

Grinding Process ◽

Comparative Tests ◽

Damage Degree ◽

Ultrasonic Grinding ◽

Ultrasonic Assisted ◽

Single Grit Grinding

The ultrasonic-assisted single-grit grinding device is designed which can be used to efficiently simulate grinding process, and the comparative tests of single-grit ultrasonic grinding are carried out between Nano-ZrO2 ceramics and ZTA ceramics under different grinding depth. The experimental results show that the bigger the scratch depth was, the greater damage degree of material was, nano-ZrO2 ceramics’ grooves is smoother than that of ZTA ceramics and the damage of its material is minor; ultrasonic vibration broadens the range of plastic cutting of Nano-ZrO2 ceramics in some degree. The experimental phenomena also show that the rolling role of abrasive particle can be conducive to material plastic deformation.

Download Full-text

SHAPE FACTOR ANALYSIS OF ABRASIVE PARTICLES USED IN SLURRY ABRASION TESTING

International Journal of Mechanical and Industrial Engineering ◽

10.47893/ijmie.2013.1141 ◽

2013 ◽

pp. 127-131

Author(s):

AVISHKAR RATHOD ◽

S G SAPATE ◽

R. K. KHATIRKAR

Keyword(s):

Particle Size ◽

Factor Analysis ◽

Particle Shape ◽

Shape Factor ◽

Abrasive Particle ◽

Silica Sand ◽

Abrasive Particles ◽

Wide Range ◽

Sliding Distance

The engineering components are subjected to surface damage by slurry abrasion such as transportation pipes carrying ore and mineral slurries, extruders, sand pumps and agitators, Apart from stress, abrasive particle hardness, slurry concentration, particle size and shape significantly influences slurry abrasion rate. The effect of abrasive particle shape on slurry abrasion behaviour of steels and cast irons which are widely used for wear protection has not been studied. The particle shape assumes significant importance due to fracture and fragmentation of the particles during the process of abrasion. In the present work, the particle shape characterization of silica sand abrasive particles was carried by shape factor analysis using image analysis technique. An attempt was made to correlate the different measures of shape factor with particle size of abrasive particles over a wide range. The characterization of slurry abrasion tester was carried out using slurry abrasion tester with silica sand slurry. The effect of sliding distance on slurry abrasion volume of mild steel was studied. The volume loss increased linearly with sliding distance. The scanning electron microscopic observations of worn our surfaces showed micro-ploughing and cutting as mechanism of material removal.

Download Full-text

The role of abrasive particle size on the wear of diamond-like carbon coatings

Wear ◽

10.1016/j.wear.2013.01.080 ◽

2013 ◽

Vol 302 (1-2) ◽

pp. 882-889 ◽

Cited By ~ 16

Author(s):

T. Haque ◽

D. Ertas ◽

A. Ozekcin ◽

H.W. Jin ◽

R. Srinivasan

Keyword(s):

Particle Size ◽

Abrasive Particle ◽

Diamond Like Carbon ◽

Carbon Coatings

Download Full-text

Experimental study on the relationship between organizational culture and affective well-being at work: Role of person-organization fit

PsycEXTRA Dataset ◽

10.1037/e604062012-309 ◽

2012 ◽

Author(s):

Sonia P. Goncalves ◽

Jose Neves

Keyword(s):

Experimental Study ◽

Organizational Culture ◽

Well Being ◽

Work Role ◽

Person Organization Fit ◽

The Relationship

Download Full-text

Fibrin Formation: The Role of the Fibrinogen-Fibrin Monomer Complex

Thrombosis and Haemostasis ◽

10.1055/s-0038-1648007 ◽

1976 ◽

Vol 36 (01) ◽

pp. 037-048 ◽

Cited By ~ 49

Author(s):

Eric P. Brass ◽

Walter B. Forman ◽

Robert V. Edwards ◽

Olgierd Lindan

Keyword(s):

Particle Size ◽

Induction Period ◽

Fibrin Clot ◽

Clot Formation ◽

Appreciable Amount ◽

Buffer System ◽

Homeostatic Mechanism ◽

Fibrin Formation ◽

Fibrin Monomer

SummaryThe process of fibrin formation using highly purified fibrinogen and thrombin was studied using laser fluctuation spectroscopy, a method that rapidly determines particle size in a solution. Two periods in fibrin clot formation were noted: an induction period during which no fibrin polymerization occurred and a period of rapid increase in particle size. Direct measurement of fibrin monomer polymerization and fibrinopeptide release showed no evidence of an induction period. These observations were best explained by a kinetic model for fibrin clot formation incorporating a reversible fibrinogen-fibrin monomer complex. In this model, the complex serves as a buffer system during the earliest phase of fibrin formation. This prevents the accumulation of free polymerizable fibrin monomer until an appreciable amount of fibrinogen has reacted with thrombin, at which point the fibrin monomer level rises rapidly and polymerization proceeds. Clinically, the complex may be a homeostatic mechanism preventing pathological clotting during periods of elevated fibrinogen.

Download Full-text