The hot explosive compaction (HEC) techniquedeveloped for tungsten-titanium (W-Ti) alloys has been appliedto molybdenum4itanium (Mo-Ti) alloys as well. The Mo + Tipowders were mixed and surrounded by an exothermic Ti + Cmixture. The TiC reaction, when ignited, released a largeamount of heat via a self-propagating high-temperaturesynthesis (SHS) reaction. Heat from the SHS reaction diffusedinto the Mo + Ti powder bed, causing the interior temperature torise above 1500 ℃ . When the powder bed became isothermal,it was consolidated to high density by pressure waves generatedby the detonation of an explosive. The amount of explosivecharge and the molar ratio of exothermic mixture to samplewere adjusted to produce full-density Mo-Ti alloy billets. Thebillets were sectioned and examined with scanning electronmicroscopy (SEM), energy dispersive X-ray spectroscopy(EDS), X-ray diffraction analysis (XRD), and microhardnessmeasurements. In the context of the original fabrication process,the evolution of the resultant microstructure of the Mo-Ti product is described.
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