通过战略性断裂路径控制强化陶瓷接头

IF 6.4 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jian Feng, Marion Herrmann, Antonio Hurtado
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引用次数: 0

摘要

陶瓷基陶瓷接头因其固有的脆性而臭名昭著,给高性能应用带来了挑战。为解决这一问题,我们提出了一种新方法,以提高填充金属在断裂过程中的参与度。本研究通过激光预开裂、激光图案化和激光主动钎焊技术的战略性组合,研究了 Al2O3-Al2O3 接头中裂纹的受控引发和扩展。通过引入预裂纹和非洲菊花状图案,裂纹的传播动力学发生了改变,裂纹最初被限制在预裂纹区域内,然后才通过图案侵入。此外,激光主动钎焊有效地控制了钛扩散,优化了界面强度控制。通过 SEVNB 测试进行的评估表明,断裂韧性显著增强,最大达到 25.6 ± 4.6 MPa-m0.5,而氧化铝带的断裂韧性仅为 3-5 MPa-m0.5。这种综合方法可精确控制断裂路径,从而提高陶瓷接头的性能,并有望推动其在苛刻环境中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Toughening Ceramic Joints through Strategic Fracture Path Control

Toughening Ceramic Joints through Strategic Fracture Path Control

Toughening Ceramic Joints through Strategic Fracture Path Control

Ceramic-on-ceramic joints are notorious for their inherent brittleness, posing challenges for high-performance applications. To address this, a novel approach is proposed to enhance the involvement of filler metals during fracture. This study investigates the controlled initiation and propagation of cracks in Al2O3–Al2O3 joints through a strategic combination of laser pre-cracking, laser patterning, and laser active brazing techniques. By introducing pre-cracking and African daisy-like patterning, crack propagation dynamics are altered, with cracks initially confined within pre-crack regions before navigating through pattern intrusions. Additionally, laser active brazing effectively managed titanium diffusion, optimizing interface strength control. Evaluation via SEVNB tests demonstrated a significant enhancement in fracture toughness, achieving maximal 25.6 ± 4.6 MPa·m0.5 compared to ≈3–5 MPa·m0.5 for alumina ribbons. This integrated approach offers precise control over fracture paths, thereby augmenting the performance of ceramic-on-ceramic joints, and holds promise for advancing their applications in demanding environments.

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来源期刊
Advanced Materials Technologies
Advanced Materials Technologies Materials Science-General Materials Science
CiteScore
10.20
自引率
4.40%
发文量
566
期刊介绍: Advanced Materials Technologies Advanced Materials Technologies is the new home for all technology-related materials applications research, with particular focus on advanced device design, fabrication and integration, as well as new technologies based on novel materials. It bridges the gap between fundamental laboratory research and industry.
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