Fabrication and microstructures characterization of AlN-Al2O3 porous ceramic by nitridation of Al4O4C

A novel strategy for the fabrication of AlN–AlON refractories: Nitrogen gas pressure sintering of Al4O4C

“…For simplicity and efficiency, heat-treating singlephase ternary carbide is a promising and attractive method for composites because only one single raw material is required, with the homogeneous chemical composition. 5,[18][19][20][21] Al 4 O 4 C is a promising compound for high-temperature applications and refractory because of their high melting point (1890 • C), low density (2.684 g/cm 3 ), and excellent oxidation resistance. [21][22][23][24][25][26][27] The study on high-temperature behavior of pressed Al 4 O 4 C pellets under a nitrogen atmosphere indicated that a nitride layer generated on the surface and thereby slowed the nitrogen diffusion into the substrate.…”

“…5,[18][19][20][21] Al 4 O 4 C is a promising compound for high-temperature applications and refractory because of their high melting point (1890 • C), low density (2.684 g/cm 3 ), and excellent oxidation resistance. [21][22][23][24][25][26][27] The study on high-temperature behavior of pressed Al 4 O 4 C pellets under a nitrogen atmosphere indicated that a nitride layer generated on the surface and thereby slowed the nitrogen diffusion into the substrate. 28 Wu et al 29 also found that the surface of dense Al 4 O 4 C could form an Al 2 OC-AlN solid solution layer, consequently restricting the further nitridation.…”

“…28 Wu et al 29 also found that the surface of dense Al 4 O 4 C could form an Al 2 OC-AlN solid solution layer, consequently restricting the further nitridation. Zheng et al 21 utilized the foaming method to increase the N 2 diffusion channels, and the AlN-Al 2 O 3 composites were formed with a porous structure. These results suggested the profound method of preparing non-oxide composite refractories by using single Al 4 O 4 C, and the overall reaction of Al 4 O 4 C and N 2 has been described in Equation ( 1) in previous studies.…”

“…These results suggested the profound method of preparing non-oxide composite refractories by using single Al 4 O 4 C, and the overall reaction of Al 4 O 4 C and N 2 has been described in Equation ( 1) in previous studies. 21,28 Although a good possibility is demonstrated for fabricating AlN-AlON composite via the direct nitridation of Al 4 O 4 C, no systematic study on the formation process of AlON and AlN by Al 4 O 4 C has been performed.…”

Wetting Behavior of the Ag-5CuO Brazing Alloy on ZTA Composite Ceramic with/without CuO Coating in Air

“…Advanced ceramics have wide applications owing to their outstanding properties [1,2]. Among these high-profile ceramics, zirconia toughened alumina (ZTA), a kind of ceramic matrix composite, has great potential for application in the aerospace, nuclear, mechanical, electronic, and energy industries because of its good thermal stability, high strength, favorable toughness, and excellent oxidation and corrosion resistance [3][4][5].…”