Metal passivation strengthens the interface in titanium composites reinforced with boron nitride nanotubes

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materialia Pub Date : 2025-02-08 DOI:10.1016/j.mtla.2025.102366

Zihan Liu , Ning Li , Yingchun Jiang , Chenglin Yi , Cheol Park , Catharine C. Fay , Huck Beng Chew , Changhong Ke

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Abstract

We investigate the interfacial interaction in titanium metal matrix composites (MMCs) reinforced with boron nitride nanotubes (BNNTs) through in situ scanning electron microscopy nanomechanical pullout experiments. The measurements reveal a stronger interface formed by Ti with BNNTs than carbon nanotubes (CNTs). Density functional theory (DFT) calculations reveal that the observed interfacial strength is attributed to covalent bonding formed on the metal surface that is partially oxidized due to passivation. Moreover, the composite interface maintains its strength even after prolonged thermal annealing in air, which is in stark contrast to the substantial degradation that occurs on the composite interface with CNTs. The complex interplay of metal passivation on the interfacial interaction and reinforcement opens a new avenue of exploiting metal passivation as an innovative active self-strengthening mechanism for nanotube-reinforced MMCs.

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来源期刊

Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.40

自引率

2.90%

发文量

345

审稿时长

36 days

期刊介绍： Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).