The widespread application of additive manufacturing in ceramics is still hindered by recurrent cracking issues during debinding. To date, the various strategies that have been attempted to reduce this problem often fail upon particle size reduction. Indeed, a reduction affects diffusion rates (e.g. pore network) such even slow heating and long dwell times debinding may not prevent crack format...

Low-cost magnesium aluminate spinel ceramics were successfully synthesized from the minerals of magnesite(M) and bauxite(B) via one-step sintering method. The effect ratio bauxite to magnesite on phase evolution, microstructure, as well mechanical properties was thoroughly investigated. structural analysis indicated that Mg2+ or Al3+ ions dissolved in lattice formed Mg-rich/Al-rich MgAl2O4 (MA)...

• Using LiOH, as a sintering aid, reduces the activation energy of MgAl 2 O 4 from 790 kJ.mol ?1 to 510 . Reactions between magnesium aluminate spinel and LiOH yield secondary phases that prevent grain growth. There is critical concentration ca. 0.3 wt%, above which growth promoted. The due preferential incorporation Li + Lithium hydroxide, in amounts ranging 0.1 1.2 wt% has been used aid impro...

Reduction of polycrystalline and crystalline magnesium orthovanadate Mg V O by hydrogen was investigated in the temperature 3 2 8 range of 560–9208C. A single crystal of orthorhombic Mg V O with a cation-deficient-spinel structure (25% of the magnesium atoms on 3 2 8 octahedral sites are vacant) was transformed into cubic Mg V O which has a cation-stuffed-spinel structure (8a and 16c sites were...

The effect of calcium treatment on inclusions in H08A welding rod steel was studied by industrial experiment and using thermodynamics theory. effects inclusion composition, morphology, quantity, size before after were metallographic microscope, scanning electron microscope (SEM), energy dispersive spectrometer (EDS). Thermodynamic studies show that the addition can form various forms xCaO·yAl2O...