Abstract
In this study, the synthesis of the core/shell structured diamond/akageneite hybrid particles was performed through one-step isothermal hydrolyzing. The hybrid particle was characterized by X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectra. The test results overall reveal that the akageneite coating, phase β-FeO(OH), was uniformly coated onto the diamond surface. The polishing performance of the pristine diamond and hybrid particles for the sapphire substrate was evaluated respectively. The experimental results show that the hybrid particles exhibited improved polishing quality and prolonged effective processing time of polishing pad compared with diamond particles without compromising the material remove rate and surface roughness. The improved polishing behavior might be attributed to the β-FeOOH coating, which is conducive to less abrasive shedding and reducing the scratch depth.
Highlights
Sapphire, the most common substrate used in light emitting diodes (LEDs), exhibits excellent mechanical and optical properties and is widely used in a range of applications, such as optics, electronics, and temperature sensing, etc. [1,2,3,4,5,6]
We described a novel route for preparing core/shell structured diamond/akageneite hybrid particle via one-step isothermal hydrolyzing to reduce the abrasive shedding and mechanical damage during polishing
The core/shell structured diamond/akageneite hybrid particles were prepared via one-step isothermal hydrolyzing under relatively low temperature
Summary
The most common substrate used in light emitting diodes (LEDs), exhibits excellent mechanical and optical properties and is widely used in a range of applications, such as optics, electronics, and temperature sensing, etc. [1,2,3,4,5,6]. The scratch defect and mechanical damage are induced because the diamond particles are irregular in shape and possess sharp edges, corners, and apexes with high hardness. Akageneite with low hardness value can reduce the mechanical damages caused by the sharp edges of diamond abrasives. We described a novel route for preparing core/shell structured diamond/akageneite hybrid particle via one-step isothermal hydrolyzing to reduce the abrasive shedding and mechanical damage during polishing. The formation of akageneite is prone to occur on the surface of diamond rather than in the solution To elucidate their structure and composition, the hybrid particles were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and Fourier transform infrared spectra (FTIR). Based on the SG polishing tool, the polishing performance of the pristine diamond and hybrid particles for sapphire substrate were evaluated respectively
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