Novel design of a Si3N4/BaO–Al2O3–SiO2 coating with a heterogeneous-layer structure on porous Si3N4 ceramic

Microstructure performance enhancement of Si3N4 reinforced laser clad KF110 base composite coatings

“…TiN nucleated preferentially during the in situ reactions between Ti/N due to its high melting point. The tendency to micro‐cracks of this coating was increased due to the excessive content of Si 3 N 4 19–21 . Figure 1D indicates that the micro‐crack can be observed in Ti 5 Si 3 with high hardness/brittleness in specimen 2.…”

“…The tendency to micro-cracks of this coating was increased due to the excessive content of Si 3 N 4 . [19][20][21] Figure 1D indicates that the micro-crack can be observed in Ti 5 Si 3 with high hardness/brittleness in specimen 2. The thermal/internal stress were produced due to uneven shrinkage/expansion of the mixed powders, exceeding the tensile strength limit under the actions of difference of temperature gradient and the thermal expansion coefficient in LIP.…”

Thermal Conductive Networks Constructed by Sialon Fibers in-Situ Synthesized in Barium Aluminosilicate Glass-Ceramic

“…However, the intrinsic brittleness of the BAS has become the neck problem for its broad application, and several manufacturing routes have been proposed to enhance its toughness [17][18][19][20][21][22][23][24]. Methods that allow for the incorporation of nano-scale second phase of high thermal ability have been found to be effective in simultaneously enhancing the strength and thermal stability of the composites [25][26][27]. In these approaches, the second phases, such as BN [25], Si3N4 [26], were added by being mixed with ceramic precursor powders and formed by hot compression molding method.…”