临床口腔医学杂志2026，Vol.42Issue(9)：515-518,4.DOI:10.3969/j.issn.1003-1634.2026.09.002
晶体取向对二硅酸锂玻璃陶瓷力学性能的影响
Effects of crystallographic orientation on mechanical properties of lithium disilicate glass-ceramics
摘要
Abstract
Objective:To investigate the effects of crystallographic orientation on the microstructure and mechanical properties of lithium disilicate glass-ceramics.Methods:Conventionally hot-pressed lithium disilicate glass-ceramics were set as the control group.Specimens were fabricated via conventional ECAP and modified ECAP with reduced-diameter channels,respectively.Specimens of each group were etched on longitudinal and transverse sections for microscopic morphological ob-servation.Hardness and fracture toughness were tested,and the anisotropy of crack propagation was analyzed.Results:The ECAP technique could effectively induce preferred crystal orientation,and specimens prepared by modified ECAP with re-duced-diameter channels exhibited superior consistency in crystallographic orientation.Compared with the conventional hot-pressed group,both types of ECAP-modified specimens achieved higher hardness(P<0.05),whereas their fracture toughness decreased(P<0.05).Conclusion:The modified ECAP process with reduced-diameter channels enables controllable regula-tion of crystallographic orientation in lithium disilicate glass-ceramics and effectively increases surface hardness.Crystal ori-entation governs the mechanical properties and crack propagation behavior of glass-ceramics.关键词
二硅酸锂玻璃陶瓷/晶体取向/等通道转角挤压/力学性能Key words
Lithium disilicate glass-ceramic/Crystallographic orientation/Equal-channel angular pressing/Mechani-cal properties分类
医药卫生引用本文复制引用
王雅萱,侯锐,吴婷,张珍珍..晶体取向对二硅酸锂玻璃陶瓷力学性能的影响[J].临床口腔医学杂志,2026,42(9):515-518,4.基金项目
陕西省卫生健康科研创新能力提升计划重点研发项目(2025YF-10) （2025YF-10）
