Abstract
Creation of micro dimples on material surface is significant for their functional applications. Because of unique properties, metallic glasses are regarded as emerging structural and functional materials but they are also a kind of difficult-to-cut materials due to high hardness and easy to crystallization and oxidation. In this study, a new method was proposed to fabricate micro dimples on metallic glass surface, which consisted of two steps, nanoindentation experiments to form the pre-indent array followed by polishing. Via this two-step method, square and rectangle dimples were successfully formed which exhibited multi-scale features with one relatively large dimple with width in micron-scale and depth in nanometer-scale, together with relatively small residual indents in nanometer-scale distributed on its bottom surface. The experimental results indicated that the depth of multi-scale dimples was affected by the spatial interval between two indents and the polishing time. Under the used experimental conditions, for the same polishing time, the depth of the large dimple was decreased when increasing the interval; for the same interval, with increase in the polishing time, the depth of the large dimple was also decreased. The possible formation mechanism of the large dimple was discussed, which was mainly ascribed to the enhanced material removal at the position of pre-indent array because of the concentration of polishing particles by the pre-indents.
| Original language | English |
|---|---|
| Pages (from-to) | 565-574 |
| Number of pages | 10 |
| Journal | Applied Surface Science |
| Volume | 462 |
| DOIs | |
| Publication status | Published - 2018 Dec 31 |
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Keywords
- Metallic glass
- Multi-scale dimple
- Nanoindentation
- Polishing
- Pre-indent
ASJC Scopus subject areas
- Surfaces, Coatings and Films
Cite this
Multi-scale dimple creation on metallic glass by a two-step method involving nanoindentation and polishing. / Huang, Hu; Yan, Jiwang.
In: Applied Surface Science, Vol. 462, 31.12.2018, p. 565-574.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Multi-scale dimple creation on metallic glass by a two-step method involving nanoindentation and polishing
AU - Huang, Hu
AU - Yan, Jiwang
PY - 2018/12/31
Y1 - 2018/12/31
N2 - Creation of micro dimples on material surface is significant for their functional applications. Because of unique properties, metallic glasses are regarded as emerging structural and functional materials but they are also a kind of difficult-to-cut materials due to high hardness and easy to crystallization and oxidation. In this study, a new method was proposed to fabricate micro dimples on metallic glass surface, which consisted of two steps, nanoindentation experiments to form the pre-indent array followed by polishing. Via this two-step method, square and rectangle dimples were successfully formed which exhibited multi-scale features with one relatively large dimple with width in micron-scale and depth in nanometer-scale, together with relatively small residual indents in nanometer-scale distributed on its bottom surface. The experimental results indicated that the depth of multi-scale dimples was affected by the spatial interval between two indents and the polishing time. Under the used experimental conditions, for the same polishing time, the depth of the large dimple was decreased when increasing the interval; for the same interval, with increase in the polishing time, the depth of the large dimple was also decreased. The possible formation mechanism of the large dimple was discussed, which was mainly ascribed to the enhanced material removal at the position of pre-indent array because of the concentration of polishing particles by the pre-indents.
AB - Creation of micro dimples on material surface is significant for their functional applications. Because of unique properties, metallic glasses are regarded as emerging structural and functional materials but they are also a kind of difficult-to-cut materials due to high hardness and easy to crystallization and oxidation. In this study, a new method was proposed to fabricate micro dimples on metallic glass surface, which consisted of two steps, nanoindentation experiments to form the pre-indent array followed by polishing. Via this two-step method, square and rectangle dimples were successfully formed which exhibited multi-scale features with one relatively large dimple with width in micron-scale and depth in nanometer-scale, together with relatively small residual indents in nanometer-scale distributed on its bottom surface. The experimental results indicated that the depth of multi-scale dimples was affected by the spatial interval between two indents and the polishing time. Under the used experimental conditions, for the same polishing time, the depth of the large dimple was decreased when increasing the interval; for the same interval, with increase in the polishing time, the depth of the large dimple was also decreased. The possible formation mechanism of the large dimple was discussed, which was mainly ascribed to the enhanced material removal at the position of pre-indent array because of the concentration of polishing particles by the pre-indents.
KW - Metallic glass
KW - Multi-scale dimple
KW - Nanoindentation
KW - Polishing
KW - Pre-indent
UR - http://www.scopus.com/inward/record.url?scp=85052134109&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85052134109&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2018.08.180
DO - 10.1016/j.apsusc.2018.08.180
M3 - Article
VL - 462
SP - 565
EP - 574
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -