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<p>The feasibility of developing high-strength nanostructured glass-ceramic materials based on lithium aluminosilicate glasses is substantiated with regard to achieving a combination of physicochemical and performance properties for priority areas of science, engineering, and industry. The use of biomimetic principles of crack formation in glass-ceramic materials – by analogy with rock – is analyzed within Griffith’s energy criterion and Irwin’s force criterion. It is shown that the crack-resistance index (CR), determined by the character of crystallization, and the fracture toughness, which depends on the change in crystal size, are complementary in assessing the crack resistance of glass materials and make it possible to determine the tendency of various materials not only to the initiation and growth of cracks but also to their blocking and self-healing. Compositions of lithium-aluminosilicate glasses were modified toward increasing strength properties, and glass-ceramic materials were obtained from them by short-time, low-temperature two-stage heat treatment. The main factors in forming a high-strength structure of glass-ceramic materials are established: crystallization of lithium-aluminosilicate glasses in the formation region of β-eucryptite, β-spodumene, or lithium disilicate and metastable phase separation; the formation of a dissipative structure during the self-organization of clusters by phase separation of the glass to effectively limit and retard the growth of spherulite size; and glass nanostructuring to form an oriented, densely packed dendritic structure with translational symmetry. A comparative evaluation of the mechanical properties of the developed lithium-aluminosilicate glass-ceramic materials based on β-spodumene, β-eucryptite, and lithium disilicate showed that their strength characteristics make them promising for use under significant dynamic loads in the design of structures for special aircraft and ground vehicles, and in instrument engineering for the needs of power engineering and electronics.</p>

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High-Strength Nanostructured Glass-Ceramic Materials for Special-Purpose Equipment and Devices

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • O. V. Savvova,
  • O. I. Fesenko,
  • O. V. Babich,
  • N. V. Smetankina,
  • Yu. O. Smyrnova,
  • M. I. Tymoshchuk

摘要

The feasibility of developing high-strength nanostructured glass-ceramic materials based on lithium aluminosilicate glasses is substantiated with regard to achieving a combination of physicochemical and performance properties for priority areas of science, engineering, and industry. The use of biomimetic principles of crack formation in glass-ceramic materials – by analogy with rock – is analyzed within Griffith’s energy criterion and Irwin’s force criterion. It is shown that the crack-resistance index (CR), determined by the character of crystallization, and the fracture toughness, which depends on the change in crystal size, are complementary in assessing the crack resistance of glass materials and make it possible to determine the tendency of various materials not only to the initiation and growth of cracks but also to their blocking and self-healing. Compositions of lithium-aluminosilicate glasses were modified toward increasing strength properties, and glass-ceramic materials were obtained from them by short-time, low-temperature two-stage heat treatment. The main factors in forming a high-strength structure of glass-ceramic materials are established: crystallization of lithium-aluminosilicate glasses in the formation region of β-eucryptite, β-spodumene, or lithium disilicate and metastable phase separation; the formation of a dissipative structure during the self-organization of clusters by phase separation of the glass to effectively limit and retard the growth of spherulite size; and glass nanostructuring to form an oriented, densely packed dendritic structure with translational symmetry. A comparative evaluation of the mechanical properties of the developed lithium-aluminosilicate glass-ceramic materials based on β-spodumene, β-eucryptite, and lithium disilicate showed that their strength characteristics make them promising for use under significant dynamic loads in the design of structures for special aircraft and ground vehicles, and in instrument engineering for the needs of power engineering and electronics.