Experimental Investigation of Grinding Force and Material Removal Mechanism of Laser-Structured Zirconia Ceramics

Pang, Jingzhu; Ji, Xia; Yan, Ning; Chen, Heng

doi:10.3390/mi13050710

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…In contrast to laser preheating-assisted grinding, which alters the thermophysical properties of materials to enhance processing efficiency [26], some researchers have explored laser surface texturing as a means to improve material removal efficiency by altering the physical properties of the material. Pang et al conducted surface texturing on zirconia ceramics and confirmed the improved grinding performance achieved through this approach [27]. Azarhoushang et al developed a novel laser-assisted grinding process to achieve a damage-free grinding surface with the assistance of laser technology [28].…”

Section: Introductionmentioning

confidence: 96%

Experimental investigations on surface topography and scratching performance of silicon nitride ceramics ablated by nanosecond pulsed laser

Niu,

Pang,

et al. 2023

Int J Adv Manuf Technol

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In the processing of hard and brittle materials such as silicon nitride (𝑆𝑖 3 𝑁 4 ), machining is often accompanied by numerous shortcomings which lead to poor processing efficiency. In order to enhance the grinding efficiency of silicon nitride ceramics, the material's strength is weakened through a 355 nm nanosecond pulsed laser for generating microscale textural patterns on ceramic surfaces. This paper investigates the influence of overlap rate on the material surface and the scratching characteristics of single diamond abrasive grains on the grooved and cratered surfaces to elucidate the material removal mechanism of the textured surface. Experimental results indicate that the time series of laser ablation depth follows fractal geometry, and the laser ablation products primarily consist of a mixture of silicon and silica. Laser-induced surface texturing facilitates a transition in the material removal mechanism from a mode dominated by plastic flow to a mixed mode involving both brittle fracture and plastic flow. In contrast to grooved surfaces, cratered surfaces demonstrate diminished fracture impact regions and lower acoustic emission signal values, thereby making them more suitable for machining operations under high levels of scratching force.

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Section: Introductionmentioning

confidence: 96%

Experimental investigations on surface topography and scratching performance of silicon nitride ceramics ablated by nanosecond pulsed laser

Niu,

Pang,

et al. 2023

Int J Adv Manuf Technol

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“…At present, the research work on improving the surface machining quality of Si 3 N 4 ceramic materials mainly focuses on the grinding mechanism of ceramic materials, the micro morphology of ceramic surface and the core key technologies such as diamond grinding wheel dressing. Representative research work includes literature [3][4][5][6][7], which discusses the influence of different grinding processes on the surface roughness, surface morphology and sub-surface damage of Si 3 N 4 based on the brittle fracture characteristics of Si 3 N 4 materials in the traditional grinding process. At the same time, it is consistently proposed that the process from brittle removal to plastic removal in Si 3 N 4 grinding can obviously improve the grinding surface quality.…”

Section: Introductionmentioning

confidence: 99%

Study on optimization of surface processing technology of silicon nitride bearing ring

Wei²,

Li³

et al. 2023

Mater. Res. Express

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Based on the difficult machining characteristics of silicon nitride materials, this manuscript focuses on optimizing the precision machining process of silicon nitride bearing components and improving the machining efficiency and quality of silicon nitride bearing components. Firstly, the mechanism of crack formation and propagation in hard and brittle materials under the action of abrasive particles is discussed in this paper, and based on this, a kinematic model of single abrasive grain cutting on hard and brittle materials is established. The effect of workpiece linear velocity, grinding wheel linear velocity, grinding wheel oscillation velocity and feed velocity on inner surface roughness of Si3N4 ring was discussed through grinding test. The experimental results show that the surface roughness can reach about Ra0.20~Ra0.33μm through a large number of grinding experiments by adjusting the combination of process parameters μ m. On this basis, use the optimized process parameters calculated by the surface quality prediction model constructed in this manuscript to conduct grinding test again, and the surface roughness value reaches about Ra0.19~Ra0.23μm. The purpose of optimizing the process parameters is realized. Finally, the surface roughness can be further reduced and maintained at Ra0.05~Ra0.06μm by further superfinishing the surface after the process optimization with an oilstone. The research work of this manuscript realized the optimization of precision machining process of silicon nitride bearing ring and the rapid optimization of machining process through the established prediction model, which improved the precision machining efficiency of ceramic bearing components. Through the study of this manuscript, a process route of controllable processing of inner surface quality of Si3N4 ring is formed, from preliminary selection of process parameters by optimization model to precision grinding and then to ultra-finishing of whetstone, which provides theoretical reference for efficient and precise manufacturing of practical bearing components.

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“…They also reported a maximum of 40% reduction in grinding forces. 29 According to the abovementioned discussions, several researches have investigated the effect of macro-micro-structures on the outputs of the grinding process. However, in previous researches, the material removal volume by laser structuring was not constant for different patterns.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the creep feed grinding of laser macro-structured alumina considering constant material removal volume

Nadi

Esmaeilzadeh

Raftar

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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Engineering ceramics such as alumina have found special applications in aerospace, electronics, and automotive industries due to their superior mechanical and thermal properties. Among these properties, chemical stability at high temperatures, high strength to weight ratio, hardness, strength, wear, and corrosion resistance are of prime importance. Due to these superior properties, processing of these ceramics encounters some difficulties and requires special machining processes such as diamond grinding; in addition to high manufacturing costs, this technique suffers from noticeable challenges such as high grinding forces and temperatures which may lead to serious surface damages. To overcome these challenges, in recent years, laser-assisted grinding has been introduced; in this process, laser source is used to preheat or structuring the workpiece surface in order to reduce grinding forces and temperatures. In this research, first four different patterns were created on alumina using a pulsed laser. Then, these weakened structures were machined using creep feed grinding. In order to provide a better understanding from the effect of each pattern, the volume of the material that can be removed was kept constant in all four patterns. Finally, the effect of created patterns on grinding forces and surface roughness has been studied. Besides, scanning electron microscopy has been used to investigate possible surface damages. The results showed that the normal and tangential forces in the non-structured case were 2 and 2.7 times higher than the forces recorded in the best patterned samples. However, no significant effect of the created patterns on the surface roughness was observed. Furthermore, serious heat damage and cracks were not observed in the structured workpieces, but non-structured workpieces were crushed during operation. Among the created patterns, pattern with perpendicular grooves to the grinding direction was introduced as the best.

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Experimental Investigation of Grinding Force and Material Removal Mechanism of Laser-Structured Zirconia Ceramics

Cited by 8 publications

References 18 publications

Experimental investigations on surface topography and scratching performance of silicon nitride ceramics ablated by nanosecond pulsed laser

Experimental investigations on surface topography and scratching performance of silicon nitride ceramics ablated by nanosecond pulsed laser

Study on optimization of surface processing technology of silicon nitride bearing ring

An experimental study on the creep feed grinding of laser macro-structured alumina considering constant material removal volume

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