Abstract The corrosion behavior of environmental barrier coatings (EBCs) directly affects the service life and stability ceramic matrix composite (CMC) structural parts in aero-engines. silicon carbide (SiC) whisker toughening phase c-AlPO 4 bonding are firstly used to improve novel tri-layer Yb 2 Si O 7 /mullite/SiC EBCs burner rig test. formation penetrating cracks coating caused failure at 1...

Al-SiC composites are among the most demanding metal matrix composites due to their excellent strength, good ductility, good corrosion resistance, low coefficient of thermal expansion and reasonable price. Manufacturing of cast metal matrix composites usually involves some problems such as inhomogeneous distribution of the particles due to poor wetability of ceramics to molten alloys, porosity ...

Oxidative coupling of methane (OCM) is a promising single-step route to convert natural gas high-valued chemicals. It generally agreed that Mn–Na–W catalysts offer balanced conversion–selectivity trade-off. The present work outlines novel SiC–SiO2 support synthesized by spray drying extend the lifetime catalyst. Incorporating SiC into enables exothermic reaction heat be effectively dissipated, ...

Microstructural and mechanical characterization of 10 vol% SiC particles (SiCp) reinforced 6061 Al-based composite fabricated by powder thixoforming (PTF) was investigated in comparison with the PTF and permanent mold cast (PMC) 6061 monolithic alloys. The results reveal that the microstructure of the PMC alloy consists of coarse and equiaxed α dendrites and interdendritic net-like eutectic pha...

The structural characteristics, mechanical and damping properties of stir-cast Al-10 wt.% Zn based composites developed using 6 8 Cu, SiC particles as reinforcements, were investigated. low porosity (<4%), near absence dissolved Cu in the Al-Zn matrix, marginal presence melt reaction-induced intermetallic phases, attest to soundness castings. Besides hardness, strength parameters − ultimate ...

In this paper we demonstrate that distinguishing between the polytypes of silicon carbide by means of infrared features in small-grain spectra is impossible. Therefore, the infrared spectra of carbon stars, unfortunately, do not provide a means for drawing comparisons between the crystal structures of grains condensed in these environments and found in meteorites. This is proven first by compar...

A cold-wall upstream reactor was designed to study the deposition of P-Sic layers on WC-Co hard metal substrates. Experiments demonstrated that P-Sic coatings can be easily deposited on inductively heated substrates at temperatures between 1000-1400°C by thermal decomposition of 1,2-dimethyldisilane under normal pressure conditions. It was shown that this silicon compound is an advanced precurs...