Fig. 8

SEM images of hot-pressed samples prepared from the powders after hours of decantation without CAS conditions. a SEI of the sample that was hot-pressed for 17 h at 1100 °C and 50 MPa (Exp. #6). b SEI of the sample that was hot-pressed for 100 h at 1100 °C and 50 MPa (Exp. #8). c BEI of the same place as (b). d SEI of the sample that was hot-pressed for 100 h at 1100 °C and 50 MPa and was mottled white (Exp. #8). e BEI of the same place as (d). f SEI of the sample that was hot-pressed for 18 h at 1080 °C and 100 MPa (Exp. #10). The left side of the image corresponds to the white mottled area, and the right side of the image corresponds to the black mottled area