Majić, Marijana and Ćurković, Lidija (2012) Fracture toughness of alumina ceramics determined by vickers indentation technique. = Fracture toughness of alumina ceramics determined by vickers indentation technique. Materialpruefung/Materials Testing, 54 (4). pp. 228-232. ISSN 0025-5300. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q4 (2012). Točan broj autora: 2.
Full text not available from this repository.Abstract
Fracture toughness (K IC) of high purity cold isostatically pressed alumina ceramic (CIP-AI 2O 3) was determined from the size of cracks induced by Vickers hardness testing at wide range of loads. The observed cracks ap-peared at following loads: 4.905 N, 9.81 N, 29.43 N and 49.05 N. The stud-ied material exhibits half-penny crack system at lower load of 4.905 N, but it proceeds as the Palmqvist crack system at higher loads, which was determined computationally. For the fracture toughness calculation differ-ent models were compared. It was found that fracture toughness in-creases by rising applied load for all kind of models, which is explained by the indentation size effect. As the fracture toughness overestimation can lead to product malfunction, it is suggested to use the Niihara model, which gives the smallest fracture toughness values.
| Item Type: | Article (["eprint_fieldopt_article_type_article" not defined]) |
|---|---|
| Keywords (Croatian): | Alumina ceramic; Applied loads; Crack systems; Fracture toughness values; High purity; Higher loads; Indentation size effects; Product malfunctions; Vickers indentation technique; Alumina; Ceramic materials; Indentation; Vickers hardness testing; Cracks |
| Subjects: | TECHNICAL SCIENCE |
| Divisions: | 1000 Department of Materials > 1010 Chair of Materials and Tribology |
| Indexed in Web of Science: | Yes |
| Indexed in Current Contents: | No |
| Quartiles: | Q4 (2012) |
| Citations SCOPUS: | 1 (11.03.2016.) |
| Date Deposited: | 27 Apr 2015 12:40 |
| Last Modified: | 14 Mar 2016 10:46 |
| URI: | http://repozitorij.fsb.hr/id/eprint/3961 |
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