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- Title
Mechanical Properties of CaO–Al 2 O 3 –SiO 2 Glass-Ceramics Precipitating Hexagonal CaAl 2 Si 2 O 8 Crystals.
- Authors
Maeda, Kei; Akatsuka, Kosho; Okuma, Gaku; Yasumori, Atsuo
- Abstract
Fracture behavior via a flexural test for a newly found CaO–Al2O3–SiO2 (CAS) glass-ceramic (GC) was compared with that of enstatite GC and mica GC, which are well-known GCs with high-fracture toughness and machinability, respectively. By focusing on the nonelastic load–displacement curves, CAS GC was characterized as a less brittle material similar to machinable mica GC, compared with enstatite GC, which showed higher fracture toughness, KIC. The microcrack toughening mechanism in CAS GC was supported by the nondestructive observation of microcracks around the Vickers indentation using the X-ray microcomputed tomography technique. The CAS GC also showed higher transparency than mica GC due to its low crystallinity. Moreover, the precursor glass had easy formability due to its low-liquidus temperature.
- Subjects
GLASS-ceramics; BRITTLE materials; FRACTURE toughness; CRYSTALS; ENSTATITE; MICA
- Publication
Crystals (2073-4352), 2021, Vol 11, Issue 4, p393
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst11040393