发表机构
Chang’an University; Karlsruhe Institute of Technology; Southern University of Science and Technology（长安大学; 卡尔斯鲁厄理工学院; 南方科技大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出基于电场与热场耦合的闪速处理（FP）方法，使TiO2陶瓷在室温下实现15.4%的大塑性压缩应变，为改善陶瓷室温塑性提供了简单有效的缺陷工程途径。
AI 中文摘要
陶瓷是现代工程与高技术应用不可或缺的材料，但室温下的固有脆性会引发灾难性失效，严重限制其广泛应用。本研究报道一种基于电场与热场耦合的闪速处理（FP）方法，可显著提升TiO2陶瓷的室温塑性，在微柱压缩测试中实现15.4%的大塑性压缩应变。该大室温塑性归因于加载过程中堆垛层错与孪晶界的增殖，这可能由FP方法引入的高浓度氧空位辅助。研究表明，FP可作为一种简单有效的方法，通过缺陷工程改善陶瓷材料的室温塑性。
英文摘要
Ceramics are indispensable materials for modern engineering and high-technology applications. However, the intrinsic brittleness at room temperature can cause catastrophic failure and severely limit their widespread applications. Here, we report a flash processing (FP) method based on the coupling of electric and thermal fields to significantly improve the room-temperature plasticity of TiO2 ceramics with a large plastic compressive strain of 15.4% during micropillar compression. This large room-temperature plasticity is attributed to the proliferation of stacking faults and twin boundaries during the loading process, which may be assisted by the high concentration of oxygen vacancies introduced by the FP method. Our findings suggest that FP can be a simple and effective method for achieving improved room-temperature plasticity of ceramic materials through defect engineering.
Comments6 figures
