This paper presents results of porous Sic characterization using photoluminescence, Raman scattering and Atomic Force Microscopy. A comparative optical spectroscopy study on bulk Sic and porous Sic layers has shown a number of new features specific to nano-crystallite materials. The role of these effects on optical spectroscopy data in porous Sic accessed by photoluminescence and Raman scatteri...

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...

Alveolar macrophages are thought to play an important role in fibrogenesis in the lungs caused by various types of exposure to dust. In this experiment, we evaluated the effect of silicon carbide whiskers (SiC) on alveolar macrophages mainly by unique magnetometry and also by established methods such as lactate dehydrogenase (LDH) activity, apoptosis measurement and morphological observations. ...

Fe and Co nano-whiskers platelets were synthesized via physical vapor deposition without any template catalyst. Transmission electron microscopic analyses revealed that the whiskers all single crystal with whisker axis along [1 0 0] crystallographic direction. Both FCC HCP structures found in stacking faults micro-twins. Off-axis Electron holography results showed magnetic domain structures. Vo...

C is the second most important natural polymer in the nature after cellulose. The main sources of the chitin compounds are shrimp and crabs.Our objective is to discuss the state of the art on extraction of nano chitin whiskers and Chitin based nanocomposites using different type of polymer matrixes. This review manly focuses on the preparation, characterization, properties, morphologies and che...