papers

Interfaces in as-extruded XD Al/TiC and Al/TiB2 metal matrix composites

A detailed study was conducted of the microstructure and particle-matrix interfaces in Al/TiC p metal matrix composites prepared by the XD process and subsequent extrusion. A study of the morphology of the TiC particles showed that the surfaces are low index (111) and (200) planes, the former being more common. Direct ...

Aging behaviour of Al–Cu–Mg alloy–SiC composites

The age-hardening kinetics of powder metallurgy processed AlCuMg alloy and composites with 5, 15 or 25 vol.% SiC reinforcements, subjected to solution treatment at 495 C for 0.5 h or at 504 C for 4 h followed by aging at 191 C, have been studied. The AlSiC interfaces in composites show undissolved, coarse intermetallic...

Electrical and thermophysical properties of ZrB2 and HfB2 based composites

Electrical resistivities, thermal conductivities and thermal expansion coefficients of hot-pressed ZrB 2 SiC, ZrB 2 SiCSi 3 N 4 , ZrB 2 ZrCSiCSi 3 N 4 and HfB 2 SiC composites have been evaluated. Effects of Si 3 N 4 and ZrC additions on electrical and thermophysical properties of ZrB 2 SiC composite have been investig...

Oxidation behaviour of the Mo–Si–B and Mo–Si–B–Al alloys in the temperature range of 700–

The isothermal oxidation kinetics of molybdenum silicide based alloys with composition (in at.%) as 76Mo14Si10B (MSB), 77Mo12Si8B3Al (MSB3AL), and 73.4Mo11.2Si8.1B7.3Al (MSB7.3AL) processed by reaction hot pressing of elemental powders, have been investigated in the temperature range of 7001300C in dry air for 24h. The...

Microstructure and mechanical behaviour of reaction hot pressed multiphase Mo–Si–B and Mo–Si–

Microstructures of 76Mo14Si10B, 77Mo12Si8B3Al, and 73.4Mo11.2Si8.1B7.3Al alloys, processed by reaction hot pressing of elemental powder mixtures, have shown -Mo, Mo 3 Si, and Mo 5 SiB 2 phases. In addition, particles of SiO 2 formed from the oxygen content of raw materials could be seen in the 76Mo14Si10B alloy, while ...