Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> Crystals
Fracture behavior via a flexural test for a newly found CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> (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, respective...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-04-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/11/4/393 |
| _version_ | 1797538382750941184 |
|---|---|
| author | Kei Maeda Kosho Akatsuka Gaku Okuma Atsuo Yasumori |
| author_facet | Kei Maeda Kosho Akatsuka Gaku Okuma Atsuo Yasumori |
| author_sort | Kei Maeda |
| collection | DOAJ |
| description | Fracture behavior via a flexural test for a newly found CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> (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, <i>K<sub>IC</sub></i>. 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. |
| first_indexed | 2024-03-10T12:29:46Z |
| format | Article |
| id | doaj.art-3d4f92467ac24519ae55cd22ca2ca3e7 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T12:29:46Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-3d4f92467ac24519ae55cd22ca2ca3e72023-11-21T14:44:01ZengMDPI AGCrystals2073-43522021-04-0111439310.3390/cryst11040393Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> CrystalsKei Maeda0Kosho Akatsuka1Gaku Okuma2Atsuo Yasumori3Department of Materials Science and Technology, Tokyo University of Science, Tokyo 125-8585, JapanAGC Inc., Yokohama Technical Center, Kanagawa 230-0045, JapanResearch Center for Structural Materials, National Institute for Materials Science, Ibaraki 305-0047, JapanDepartment of Materials Science and Technology, Tokyo University of Science, Tokyo 125-8585, JapanFracture behavior via a flexural test for a newly found CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> (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, <i>K<sub>IC</sub></i>. 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.https://www.mdpi.com/2073-4352/11/4/393glass-ceramicsfracture toughnessbrittleness |
| spellingShingle | Kei Maeda Kosho Akatsuka Gaku Okuma Atsuo Yasumori Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> Crystals Crystals glass-ceramics fracture toughness brittleness |
| title | Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> Crystals |
| title_full | Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> Crystals |
| title_fullStr | Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> Crystals |
| title_full_unstemmed | Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> Crystals |
| title_short | Mechanical Properties of CaO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> Glass-Ceramics Precipitating Hexagonal CaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> Crystals |
| title_sort | mechanical properties of cao al sub 2 sub o sub 3 sub sio sub 2 sub glass ceramics precipitating hexagonal caal sub 2 sub si sub 2 sub o sub 8 sub crystals |
| topic | glass-ceramics fracture toughness brittleness |
| url | https://www.mdpi.com/2073-4352/11/4/393 |
| work_keys_str_mv | AT keimaeda mechanicalpropertiesofcaoalsub2subosub3subsiosub2subglassceramicsprecipitatinghexagonalcaalsub2subsisub2subosub8subcrystals AT koshoakatsuka mechanicalpropertiesofcaoalsub2subosub3subsiosub2subglassceramicsprecipitatinghexagonalcaalsub2subsisub2subosub8subcrystals AT gakuokuma mechanicalpropertiesofcaoalsub2subosub3subsiosub2subglassceramicsprecipitatinghexagonalcaalsub2subsisub2subosub8subcrystals AT atsuoyasumori mechanicalpropertiesofcaoalsub2subosub3subsiosub2subglassceramicsprecipitatinghexagonalcaalsub2subsisub2subosub8subcrystals |