Novel Al-Mo and Al-Mo-Si Alloys Resistant to Sulfidizing and Oxidizing Environments

Optimizaton of Mo-Si-B Intermetallic Alloys

Mo-Si-B intermetallics consisting of the phases Mo3Si and Mo5SiB2, and a molybdenum solid solution (“ -Mo”), have melting points on the order of 2000 °C. These alloys have potential as oxidationresistant ultra-high-temperature structural materials. They can be designed with microstructures containing either individual -Mo particles or a continuous -Mo phase. A compilation of existing data shows...

Phase transition and ordering behavior of ternary Ti – Al – Mo alloys using in - situ neutron diffraction

Neutron diffraction has been used for in-situ investigations to elucidate the phase transformation behavior of two Mo-containing TiAl alloys with compositions of Ti-44Al3Mo and Ti-44Al-7Mo (in at.%). Five different phases are present in these alloys. These include three ordered phases at room temperature, namely a2, b0 and c and two disordered phases, a and b, which occur at higher temperatures...

Mo-Si-B alloys for ultrahigh-temperature structural applications.

A continuing quest in science is the development of materials capable of operating structurally at ever-increasing temperatures. Indeed, the development of gas-turbine engines for aircraft/aerospace, which has had a seminal impact on our ability to travel, has been controlled by the availability of materials capable of withstanding the higher-temperature hostile environments encountered in thes...

Precipitation Hardening of Al–Si–Mg Alloys

COMPARATIVE STUDY OF Al-Ni-Mo ALLOYS OBTAINED BY MECHANICAL ALLOYING IN DIFFERENT BALL MILLS

A comparative study was carried out for an alloy of Al50(Ni75Mo25)50 processed by two different high energy ball mills. A SPEX and Simoloyer mill were used. The milled products were characterized using X-Ray Diffraction and Scanning Electron Microscopy. A different morphology and microstructural evolution were found with each mill used. It was evident that prolonged milling time induced the for...