Long term oxidation behaviour of liquid phase pressureless sintered SiC–AlN ceramics obtained without powder bed

Liquid Phase Sintering of Silicon Carbide with AlN-Re2O3 Additives

“…Similar to other works (Rixecker et al, 2000;Magnani & Beaulardi 2005), the sintering temperature for completed densification is a function of the additive composition and the best densification behavior does not coincide with the eutectic composition in the AlN-Y 2 O 3 system(See Fig 1) (Kouhik, 2002), which is about 40 mol% AlN as shown in Fig 2. Sample Sly-2 with 60 mol%AlN reached full density at much lower temperature compared with the other two samples. Further more the temprature range of dentification is much wider than others also.…”

Oxidation behavior of AlN–SiC–TiB2 ceramics synthesized by SHS–HIP

“…Oxidation behavior of AlN-TiB 2 and AlN-SiC binary ceramics systems prepared by hot pressing or hot isostatic pressing has been studied earlier [4][5][6][7][8][9][10][11][12]. Concerning AlN-SiC binary system, Xu et al proposed a two-stage oxidizing process: a partial oxidation of SiC-AlN to ␤-SiAlON and carbon, and a final oxidation of ␤-SiAlON to mullite and a spot of silica [6].…”

Crack healing in liquid-phase-pressureless-sintered silicon carbide–aluminum nitride composites

“…3 shows that mullite and ␣-cristobalite were formed after heat-treatment at 1300 • C. Traces of yttrium disilicate (␥-Y 2 Si 2 O 7 ) were also detected due to the decomposition of the grain boundary phase Y 10 Al 2 Si 3 O 18 N 4 . 8 Another confirmation of the mechanism for the crack healing could be extracted by the analysis of the EDS spectra reported in Fig. 4.…”