Anisotropic Deformation Behavior and Indentation Size Effect of Monocrystalline BaF2 Using Nanoindentation Article Swipe
Guangyuan Du
,
Xiaojing Yang
,
Jiayun Deng
,
Yanjun Guo
,
Yao Tong
,
Maozhong Li
,
Ruiwen Geng
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.3390/ma16196469
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.3390/ma16196469
In this study, our objective is to investigate the anisotropic deformation behavior and the indentation size effect (ISE) of monocrystalline barium fluoride (BaF2) using nanoindentation experiments with a diamond Berkovich indenter. BaF2 is known for its anisotropy, which results in significant variations in its mechanical properties. This anisotropy poses challenges in achieving high processing quality in ultra-precision machining. Through our experiments, we observed numerous pop-in events in the load–displacement curves, indicating the occurrence of plastic deformation in BaF2 crystals, specifically in the (100), (110), and (111) orientations; these pop-in events were observed as the indentation depth increased to 56.9 nm, 58.2 nm, and 57.8 nm, respectively. The hardness–displacement and elastic modulus–displacement curves were obtained from the tests exhibiting the ISE. The nanoindentation hardness of BaF2 is found to be highly dependent on its crystallographic orientation. Similarly, for BaF2 in the (100) orientation, the range is from 2.43 ± 0.74 and 1.24 ± 0.12 GPa. For BaF2 in the (110) orientation, the values range from 2.15 ± 0.66 to 1.18 ± 0.15 GPa. For BaF2 in the (111) orientation, the values range from 2.12 ± 0.53 GPa to 1.19 ± 0.12 GPa. These results highlight the significant influence of crystallographic orientation on the mechanical properties of BaF2. To better understand the ISE, we employed several models including Meyer’s law, the Nix–Gao model, the proportional specimen resistance (PSR) model, and the modified PSR (mPSR) model, and compared them with our experimental results. Among these models, the mPSR model demonstrated the best level of correlation (R2>0.9999) with the experimental measurements, providing a reliable description of the ISE observed in BaF2. Our reports provide valuable insights into the anisotropic mechanical characteristics of BaF2 materials and serve as a theoretical guide for the ultra-precision machining of BaF2.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/ma16196469
- https://www.mdpi.com/1996-1944/16/19/6469/pdf?version=1695964123
- OA Status
- gold
- Cited By
- 5
- References
- 42
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4387186029
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Raw OpenAlex JSON
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- DOI
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https://doi.org/10.3390/ma16196469Digital Object Identifier
- Title
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Anisotropic Deformation Behavior and Indentation Size Effect of Monocrystalline BaF2 Using NanoindentationWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
- Publication date
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2023-09-29Full publication date if available
- Authors
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Guangyuan Du, Xiaojing Yang, Jiayun Deng, Yanjun Guo, Yao Tong, Maozhong Li, Ruiwen GengList of authors in order
- Landing page
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https://doi.org/10.3390/ma16196469Publisher landing page
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https://www.mdpi.com/1996-1944/16/19/6469/pdf?version=1695964123Direct link to full text PDF
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://www.mdpi.com/1996-1944/16/19/6469/pdf?version=1695964123Direct OA link when available
- Concepts
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Nanoindentation, Materials science, Indentation, Monocrystalline silicon, Anisotropy, Composite material, Deformation (meteorology), Optics, Metallurgy, Silicon, PhysicsTop concepts (fields/topics) attached by OpenAlex
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5Total citation count in OpenAlex
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2025: 4, 2024: 1Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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