Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates
Numerous sources have already demonstrated that varying annealing rates can result in distinct toughness and brittleness in glass. To determine the underlying mechanisms driving this phenomenon, molecular dynamic (MD) simulations were employed to investigate the microstructure of aluminosilicate gla...
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2024-03-01
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| author | Liqiang Zheng Shimin Liu Fushun Ji Lianjie Tong Shiqing Xu |
| author_facet | Liqiang Zheng Shimin Liu Fushun Ji Lianjie Tong Shiqing Xu |
| author_sort | Liqiang Zheng |
| collection | DOAJ |
| description | Numerous sources have already demonstrated that varying annealing rates can result in distinct toughness and brittleness in glass. To determine the underlying mechanisms driving this phenomenon, molecular dynamic (MD) simulations were employed to investigate the microstructure of aluminosilicate glasses under different cooling rates, and then uniaxial stretching was performed on them under controlled conditions. Results indicated that compared with short-range structure, cooling rate has a greater influence on the medium-range structure in glass, and it remarkably affects the volume of voids. Both factors play a crucial role in determining the brittleness of the glass. The former adjusts network connectivity to influence force transmission by manipulating the levels of bridging oxygen (BO) and non-bridging oxygen (NBO), and the latter accomplishes the objective of influencing brittleness by modifying the environmental conditions that affect the changes in BO and NBO content. The variation in the void environment results in differences in the strategies of the changes in BO and NBO content during glass stress. These findings stem from the excellent response of BO and NBO to the characteristic points of stress–strain curves during stretching. This paper holds importance in understanding the reasons behind the effect of cooling rates on glass brittleness and in enhancing our understanding of the ductile/brittle transition (DTB) in glass. |
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| id | doaj.art-acbe0b390e664410ae4bb6dcac390096 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-24T10:40:24Z |
| publishDate | 2024-03-01 |
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| spelling | doaj.art-acbe0b390e664410ae4bb6dcac3900962024-04-12T13:22:05ZengMDPI AGMaterials1996-19442024-03-01177159510.3390/ma17071595Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling RatesLiqiang Zheng0Shimin Liu1Fushun Ji2Lianjie Tong3Shiqing Xu4State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, ChinaHebei Building Materials Vocational and Technical College, Qinhuangdao 066004, ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, ChinaNumerous sources have already demonstrated that varying annealing rates can result in distinct toughness and brittleness in glass. To determine the underlying mechanisms driving this phenomenon, molecular dynamic (MD) simulations were employed to investigate the microstructure of aluminosilicate glasses under different cooling rates, and then uniaxial stretching was performed on them under controlled conditions. Results indicated that compared with short-range structure, cooling rate has a greater influence on the medium-range structure in glass, and it remarkably affects the volume of voids. Both factors play a crucial role in determining the brittleness of the glass. The former adjusts network connectivity to influence force transmission by manipulating the levels of bridging oxygen (BO) and non-bridging oxygen (NBO), and the latter accomplishes the objective of influencing brittleness by modifying the environmental conditions that affect the changes in BO and NBO content. The variation in the void environment results in differences in the strategies of the changes in BO and NBO content during glass stress. These findings stem from the excellent response of BO and NBO to the characteristic points of stress–strain curves during stretching. This paper holds importance in understanding the reasons behind the effect of cooling rates on glass brittleness and in enhancing our understanding of the ductile/brittle transition (DTB) in glass.https://www.mdpi.com/1996-1944/17/7/1595MD simulationaluminosilicate glassannealing rateductile/brittle transition |
| spellingShingle | Liqiang Zheng Shimin Liu Fushun Ji Lianjie Tong Shiqing Xu Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates Materials MD simulation aluminosilicate glass annealing rate ductile/brittle transition |
| title | Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates |
| title_full | Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates |
| title_fullStr | Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates |
| title_full_unstemmed | Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates |
| title_short | Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates |
| title_sort | structural causes of brittleness changes in aluminosilicate glasses with different cooling rates |
| topic | MD simulation aluminosilicate glass annealing rate ductile/brittle transition |
| url | https://www.mdpi.com/1996-1944/17/7/1595 |
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