Metal matrix composites are the class of composite materials finding vast applications in automotive, aircraft, defense, sports and appliance industries. A horizontal ball mill has been fabricated for milling of aluminum and SiC particles. The change in powder particle morphology during mechanical alloying of Aluminum and SiC powders using horizontal ball mill was studied. Al-SiCp composites wi...

Dissertation zur Erlangung des akademischen Grades Doktor der Naturwissenschaften Introduction Figure 1.1: One possible amorphous silicon (white) and carbon (black) network with incorporated hydrogen (small black dots) a-SiC:H. 20 Figure 1.2: Fourier transformed infrared (FTIR) absorption spectra for a typical stoichiometric SiC layer as deposited at 350°C. 21 Figure 1.3: Auger electron spectro...

In this work, an ultrafast solid-state microwave annealing has been performed, in the temperature range of 1700–2120 °C on Al+and P+-implanted 4H-SiC. The solid-state microwave system used in this study is capable of raising the SiC sample temperatures to extremely high values, at heating rates of 600 °C/s. The samples were annealed for 5–60 s in a pure nitrogen ambient. Atomic force microscopy...

The configurations of 10 types metal-doped silicon carbide (SiC) systems were investigated by the first-principles calculations. dopants include eight 3d-series transition metal atoms, one semi-metal Ge atom, and other Al atom. For all SiC systems, steadiest doping sites are fixed at substituted Si site, while Ti-SiC system exhibits most potent binding activity. properties these new vary with a...

Could these biblical texts be interpreted as the historical evidence that Jesus of Nazareth died of heart rupture or ‘a broken heart’ causing pericardial tamponade (punctured by the soldier’s spear)? During the last decade, a strange syndrome of extensive reversible cardiac dysfunction precipitated by acute emotional or physical stress has been increasingly recognized. The syndrome has various ...

The densification response of aluminium powder reinforced with nanometric SiC particles (50 nm) during uniaxial compaction was studied. To determine the effect of SiC nanoparticles on the compressibility of the matrix, monolithic Al powder was also examined. The effect of SiC nanoparticles on the densification mechanisms, i.e. particle rearrangement and plastic deformation, was analysed using m...