The Effects of Si Content and SiC Polytype on the Microstructure and Properties of RBSC

One- and two-step artificial aging had been performed on the 7B04 pre-stretch thick plate, whose nominal composition is similar to 7075 alloy with lower Fe and Si content. The effect of aging temper on the microstructure and properties has been studied. The research results show that T6 temper can improve the mechanical properties of the alloy greatly, yet the alloy have lower electron conductivity which is no more than 19Ms·s-1. When T73 and T74 tempers were performed on the alloy, the mechanical properties of the alloy decreased about 6~10% of the T6 strength while the electron conductivity was improved obviously. With the increasing of the aging temperature, the time that the alloy needs to get peak aging becomes shorter and the mechanical properties at peak aging status are lower. The electron conductivity of the alloy, however, becomes higher with the increasing of aging temperature. The main strengthen phase of 7B04 alloy is also η(MgZn2) phase which is same to other 7xxx series alloys.

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Investigation of microstructure and properties of magnetron sputtered Zr-Si-N thin films with different Si content

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2018.07.106 ◽

2018 ◽

Vol 353 ◽

pp. 355-363 ◽

Cited By ~ 9

Author(s):

P.C. Silva Neto ◽

F.G.R. Freitas ◽

D.A.R. Fernandez ◽

R.G. Carvalho ◽

L.C. Felix ◽

...

Keyword(s):

Thin Films ◽

Microstructure And Properties ◽

Si Content

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The Effects of Precursor C2H2 Fraction on Microstructure and Properties of Amorphous Carbon Composite Films Containing Si and Ag Prepared by Magnetron Sputtering Deposition

Nanomaterials ◽

10.3390/nano9040528 ◽

2019 ◽

Vol 9 (4) ◽

pp. 528

Author(s):

Xiaoqiang Liu ◽

Junying Hao ◽

Yongjun Lv ◽

Xuejun Cui

Keyword(s):

Magnetron Sputtering ◽

Saline Solution ◽

Composite Films ◽

Ambient Air ◽

Carbon Composite ◽

Test Environment ◽

Sputtering Deposition ◽

Microstructure And Properties ◽

Transmission Electron ◽

Si Content

Hydrogenated graphite-like carbon composite films containing silicon (Si) and silver (Ag) (g-C:H:Si:Ag) were prepared by middle frequency magnetron sputtering deposition in argon (Ar) and acetylene (C2H2) mixture gases. The effects of precursor C2H2 fraction on the microstructure and properties were studied. The results of Raman and X-ray photoelectron spectroscope (XPS) revealed that the films were dominated by sp2 carbon sites. It was observed from transmission electron microscope (TEM) that the films contained nanoparticles mainly consisting of Ag, and their size increased with the decrease in the C2H2 fraction. Si was also found to aggregate in the areas where Ag nanoparticles formed in films with high Si content. The comparative studies on the frictional behaviors of films sliding against aluminum oxide were carried out in ambient air and saline solution. The g-C:H:Si:Ag films still exhibited outstanding frictional properties even when the test environment shifts from ambient air to saline solution.

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Microstructure and Properties of Reaction-Formed Silicon Carbide

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.280-283.1271 ◽

2007 ◽

Vol 280-283 ◽

pp. 1271-1274 ◽

Cited By ~ 1

Author(s):

Yan Xiang Wang ◽

Shou Hong Tan ◽

Dong Liang Jiang

Keyword(s):

Heat Treatment ◽

Fracture Toughness ◽

Silicon Carbide ◽

Grain Size ◽

Corrosion Resistance ◽

Microstructure And Properties ◽

Bonding Area ◽

Si Content

The effects of microstructure on strength, toughness and corrosion resistance of reactionformed silicon carbide and heat treatment on the properties of reaction-formed silicon carbide have been investigated in this paper. The results show strength and corrosion resistance of reaction-formed silicon carbide decrease with increasing Si content. Fracture toughness shows no rule with free Si content. The average SiC grain size and bonding area of SiC grain increase during heat treatment at 1850°C. The strengths of the samples after heat treatment decrease compared with that of the samples before heat treatment due to the pores in the heat treatment bodies.

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