Manufacture technology status of surface modified silicon carbide mirrors

In this study, bio-based poly(lactic acid) (PLA)/polycaprolactone (PCL) blends and PLA/PCL/silicon carbide (SiC) composites were prepared using a solution blending method. The surface of the SiC whiskers was modified using a silane coupling agent. The effects of the PCL and SiC contents on the flexural properties, fracture toughness, morphology of PLA/PCL blends, and PLA/PCL/SiC composites were investigated using several techniques. Both the fracture toughness and flexural strength of PLA increased by the introduction of PCL and were further improved by the formation of SiC whiskers. Fracture surfaces were observed by scanning electron microscopy, which showed that the use of PCL as a reinforcing agent induces plastic deformation in the PLA/PCL blends. The SiC whiskers absorbed external energy because of their good interfacial adhesion with the PLA matrix and through SiC-PLA debonding in the PLA/PCL/SiC composites.

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Effect of surface modified silicon carbide particles with Al2O3 and nanocrystalline spinel ZnAl2O4 on mechanical and damping properties of the composite

Materials Science and Engineering A ◽

10.1016/j.msea.2015.07.057 ◽

2015 ◽

Vol 644 ◽

pp. 325-336 ◽

Cited By ~ 17

Author(s):

Subhash Singh ◽

Kaushik Pal

Keyword(s):

Silicon Carbide ◽

Damping Properties ◽

Silicon Carbide Particles ◽

Surface Modified ◽

Carbide Particles ◽

Effect Of Surface

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Manufacturing and testing of surface modified silicon carbide aspheric mirror

9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes ◽

10.1117/12.2504853 ◽

2019 ◽

Cited By ~ 1

Author(s):

Jiaoteng Ding ◽

Xue wu FAN ◽

Zhihai PANG ◽

Liangjie FENG ◽

Qinfang CHEN ◽

...

Keyword(s):

Silicon Carbide ◽

Aspheric Mirror ◽

Surface Modified

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Effect of Surface-Modified Si-Al-C® Fibre Addition on the Mechanical Properties of Silicon Carbide Composite

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.71.127 ◽

2010 ◽

Vol 71 ◽

pp. 127-132 ◽

Cited By ~ 2

Author(s):

H. Moriyasu ◽

J. Kita ◽

H. Suemasu ◽

Ian J. Davies ◽

S. Koda ◽

...

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Silicon Carbide ◽

Specific Surface ◽

Acid Treatment ◽

Polar Solvent ◽

Sintering Aid ◽

C Fibre ◽

Surface Modified ◽

Effect Of Surface

The effect of surface modified Si-Al-C® fibre with carbon interface (SA/C fibre) addition on the densification of silicon carbide (SiC) composite was examined. An acid treatment (H2SO4 and HNO3) was carried out at 50°C for 3 h in order to add COO- group to the surface of SA/C fibre and to enhance the dispersibility of SA/C fibre in the SiC powder due to the mixing operation in the polar solvent. Commercially available ultrafine SiC powder (specific surface area: 47.5 m2∙g-1) was mixed with acid-treated SA/C fibre and sintering aid (4.8 mass% Al4C3 and 1.2 mass% B4C) in the presence of acetone. The relative density of the SiC composite with non-acid-treated SA/C fibre addition hot-pressed at 1800°C for 1 h in Ar atmosphere under a pressure of 62 MPa was 98.4%, whereas that of the SiC composite with acid-treated SA/C fibre addition increased to 98.7%. Furthermore, the fracture toughness increased from 5.6 MPa∙m1/2 to 7.0 MPa∙m1/2 for the acid-treated SA/C fibre addition.

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