Continuing our work on understanding the oxidation behavior of multiphase composite alloys based on the Mo-Si-B system, we investigated three alloys in the Mo-Si-B system, designated as A1, A2, and A3. The nominal phase assemblages of these alloys are: A1 = Mo5Si3Bx (T1)-MoSi2-MoB, A2 = T1Mo5SiB2 (T2)-Mo3Si, and A3 = Mo-T2-Mo3Si. Our previous work showed that for exposures to 1100°C, all alloys...

Recrystallized binary Mo-0.2 wt.% Si (Mo-0.68 at.% Si) and Mo-0.3 (Mo-1.0 alloys a ternary Mo-0.75 Si-0.14 B (Mo-2.5 Si-1.2 B) alloy were tested in uniaxial tension as function of temperature vacuum the results are compared to previous on recrystallized commercial purity (CP) Mo Mo-0.1 (Mo-0.34 solid solution alloy. Yield strength increases with increasing content at all temperatures examined e...

In this study, Mo-(Y,Zr)-Si-B coatings were obtained by direct current magnetron sputtering (DCMS) and high-power impulse (HIPIMS) using mosaic targets. The results showed that the addition of Y Zr into composition Mo-Si-B led to suppression columnar grain growth, a decrease in crystallite size h-MoSi2 phase from ~50 ~5 nm, an increase amorphous crystalline phases ratio Doping coating with prom...

V-Si-B and Mo-Si-B alloys are currently the focus of materials research due to their excellent high temperature capabilities. To optimize the mechanical alloying (MA) process for these materials, we compare microstructures, morphology and particles size as well as hardness evolution during the milling process for the model alloys V-9Si-13B and Mo-9Si-8B. A variation of the rotational speed of t...

The stresses in periodic Mo/Si, W/Si, and Mo/C multilayer films were determined from wafer-curvature measurements. The layer thickness of each material was varied systematically, and parametric stress contours were generated, showing contours of constant stress in the two-dimensional layer thickness parameter space. These results illustrate that the net stress in a periodic multilayer is not an...

This work is devoted to the production of Mo-Hf-Y-Si-B-N coatings using magnetron sputtering with varying N2 flow rate; analysis discharge plasma; and investigation structure, optical, mechanical, tribological characteristics, as well crack resistance oxidation resistance, coatings. The results show that were characterized by a dense, homogeneous structure. non-reactive had maximum growth rate ...