Introduction: During our nano-mineralogy investigation of the Allende meteorite, we discovered two new minerals that occur as microto nano-crystals in refractory inclusions: Allendeite, Sc4Zr3O12, a new Scand Zr-rich oxide; and hexamolybdenum, (Mo,Ru,Fe), a Mo-dominant alloy. Allendeite, which may be an important ultra-refractory carrier linking Zr-, Scoxides and the more common Sc-, Zr-enriche...

In this paper we report the effect of three different preparation methods on first hydrogenation vanadium-rich BCC alloy Ti16V60Cr24: one-time cold rolling, 5 min ball milling and addition 4 wt.% Zr. All samples were synthesized by arc melting. Without Zr was single phase, but when added, a secondary zirconium-rich phase present. However, X-ray diffraction patterns only showed single-body-centr...

Selective laser melting (SLM) and direct energy deposition (DED) are two widely used technologies in additive manufacturing (AM). However, there few studies on the combination of technologies, which can synthetically combine advantages for more flexible material design. This paper systematically Al-Mg-Sc-Zr alloy by SLM DED with emphasis its bonding properties, microstructure, metallurgical def...

A nano/ultra-fine grain Al-0.2wt% Zr alloy was produced by accumulated roll bonding (ARB) processafter 10 cycles. The fraction of high angle grain boundaries increased from 8% to 65.4% during 10passes during ARB process. This alloy was subjected to tensile test at different temperatures (523,573and 623 K) and strain rates (0.1 and 0.01 s-1). The optimum condition of temperature and strain rate ...

• Precipitation-strengthened 2xxx Al alloys but show solidification cracking issues during AM Equiaxed, crack-free microstructures achieved in a model AlCuMg alloy by adding Zr. Strengthening S-Al 2 CuMg and L1 -Al 3 Zr precipitates after three-step heat treatment. S- -phase characterized microhardness compression testing. The processing of conventional laser-based additive manufacturing can be...

The Al–9Si–0.3Fe–0.15Mn alloy was chosen as the base alloy, 0.2Mo and 0.2Zr were added in combination (0.2Mo+0.2Zr) to maintain ductility improve strength tensile properties. 0.2Mo+0.2Zr addition showed improvement both ultimate (?UTS) (160 MPa) fracture strain (?f) (7.1%) at as-cast conditions, compared with those (145 MPa, 6.1%) of alloy. increment ?UTS ?f by 8% 14%, respectively, obtained ad...

Al2O3 coatings, which can be produced by plasma electrolytic oxidation (PEO) on aluminum substrates, provide an excellent protection against corrosion and wear. However, due to the brittle nature of oxide ceramic, fracture toughness is limited. One approach enhance tolerance incorporation ZrO2 form zirconia toughened alumina (ZTA). In addition its use as a bulk material, application coating mat...

Electrochemical corrosion and passivation characteristics of the oxide dispersion strengthened (ODS) Fe3Al–Ti ODS Fe3Al–Ti–Zr alloys immersed for different exposure times 1, 72, 120, 166 240 h in 3.5 wt % NaCl solution were studied using open-circuit potential, cyclic polarization electrochemical impedance spectroscopy techniques. Both exhibit pitting under chloride ions exposure. In both alloy...

Co-Zr amorphous alloys exhibit soft magnetic properties, whereas the Co-rich crystalline phases in this alloy system displayed a hard behavior. In study, an initial two-phase composite with overall composition of 75 at.% Co and 25 Zr was processed by high-pressure torsion (HPT), effects severe plastic deformation subsequent thermal treatment on composite’s structural evolution its properties we...