Study on the annealing and three-point bending fracture behavior of single W fiber-reinforced W composites with multiple interfaces prepared by CVD

IF 2.7 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Materials and Energy Pub Date : 2025-06-01 DOI:10.1016/j.nme.2025.101952

Chuan Wu , Youping Lu , Juan Du , Pan Wen , Jun Tang , Tianyu Zhao , Jiming Chen , Pinghuai Wang , Xiang Liu

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引用次数: 0

Abstract

The inherent brittleness of tungsten severely limits its application as plasma-facing materials (PFMs). Tungsten fiber (W_f) reinforced tungsten (W) composites (W_f/W) offer a promising toughening approach for tungsten. However, this toughening method faces significant challenges, such as how to optimize the interface strength and preventing damage to the fiber-reinforced structure. In this study, four types of interfaces (Y, Cr, Y₂O₃, and YSZ) were prepared using magnetron sputtering technology, followed by the fabrication of single W_f-reinforced W composites via chemical vapor deposition (CVD). The fracture behavior of the W_f/W composite before and after the annealing process was investigated through three-point bending tests. The results indicate that the interfaces including yttrium (Y), yttrium oxide (Y₂O₃), and yttria-stabilized zirconia (YSZ) all exhibit weak binding strength, leading to interface debonding during the three-point bending test and resulting in ductile fracture behavior for the composite. In contrast, the chromium (Cr) interface displays a high binding strength and lead to brittle fracture behavior for the composite. After annealing at 1000 °C, the binding strength of Y₂O₃ and YSZ interfaces increases, which causes the brittle fracture behavior of the composite. After annealing at 1600 °C, the Cr interface diffused into the W_f and caused the recrystallization of the W_f. The Y interface underwent melting and solidification, leading to a decrease of the binding strength. The interface strength ranks as follows: Cr > YSZ > Y₂O₃ > Y.

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CVD制备多界面单W纤维增强W复合材料的退火及三点弯曲断裂行为研究

钨的固有脆性严重限制了其作为等离子体表面材料（pfm）的应用。钨纤维增强钨复合材料（Wf/W）是一种很有前途的增韧材料。然而，这种增韧方法面临着巨大的挑战，如如何优化界面强度和防止纤维增强结构的破坏。本研究采用磁控溅射技术制备了四种界面（Y、Cr、Y2O3和YSZ），然后通过化学气相沉积（CVD）制备了单W - f增强W复合材料。通过三点弯曲试验研究了Wf/W复合材料退火前后的断裂行为。结果表明：钇(Y)、氧化钇（Y2O3）和钇稳定氧化锆（YSZ）的界面均表现出较弱的结合强度，导致复合材料在三点弯曲试验中界面脱粘，呈现韧性断裂行为；相反，铬（Cr）界面表现出较高的结合强度，导致复合材料脆性断裂。在1000 ℃退火后，Y2O3和YSZ界面的结合强度增加，导致复合材料脆性断裂。在1600 ℃退火后，Cr界面扩散到Wf中，引起Wf再结晶。Y界面熔融凝固，导致结合强度降低。界面强度排序如下：Cr >； YSZ >； Y2O3 >； Y。

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.