Study of indentation microhardness of bismuth-doped As(2)Se(3) glasses
Artykuł w czasopiśmie
| Status: | |
| Autorzy: | Kavetskyy Taras, Borc Jarosław, Sangwal Keshra |
| Rok wydania: | 2011 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 7 |
| Wolumen/Tom: | 5 |
| Strony: | 755 - 760 |
| Web of Science® Times Cited: | 1 |
| Bazy: | Web of Science |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The experimental results of an investigation of the load dependence of microhardness of the surfaces of samples of (As_{1−x}Bi_x)_2Se_3 glasses with x ≤ 0.1 wt fraction are described and discussed. It was observed that, with an increase in indentation diagonal d, the microhardness H_V of the samples first increases (reverse indentation size effect; reverse ISE), then decreases showing a maximum hardness Hmax (normal ISE), and finally increases again after attaining a minimum hardness H_{min} (reverse ISE). The experimental data in the former two regions were analyzed by using the relation H_V = H_0(1+d_0/d), where H_0 is the load-independent hardness of a sample and the parameter d_0 is related to elastic and plastic deformation of the sample. It was found that the load-independent H_0 for the samples initially increases up to maximum value (for x = 0.025) and then decreases with increasing Bi content x in these regions. These results are attributed to changes caused by Bi additive in the structure of flow defects participating in plastic deformation of the (As_{1−x}Bi_x)_2Se_3 samples. |
