TY - JOUR

T1 - Metal–Matrix Composites from High-Pressure Torsion with Functionalized Material Behavior

AU - Lemkova, Valeria

AU - Todt, Juraj

AU - Motz, Christian

AU - Schaefer, Florian

N1 - Publisher Copyright: © 2023 The Authors. Advanced Engineering Materials published by Wiley-VCH GmbH.

PY - 2023/10

Y1 - 2023/10

N2 - In composites, outstanding properties of two materials can be combined. Inparticular, metal–matrix composites (MMCs) can combine the properties of ahigh-strength ductile metallic matrix with special properties of embeddedceramic particles. This hybrid can be used to create a functional material.However, during consolidation, the thermal load of most common MMC-processing routes is an obstacle for such functionalization, because the uniqueproperties of the ceramic phases most likely degrade. Mechanical alloying, in thiscase, by high-pressure torsion (HPT), can overcome this challenge. Herein, theattempt to obtain smart materials through HPT processing is aimed. For thatpurpose, Cu-MMCs are produced from mixed powders with ZrO2and BaTiO3(BTO) with the challenge to incorporate their functional phase. BTO can providea sensing ability for internal stress and ZrO2can provide a fatigue lifetime by aretarded crack growth. The amount of the stabilized phase is evaluated by X-raydiffraction. Cu–BTO–MMCs exhibit a local piezoelectric effect when strained,shown by in situ scanning Kelvin probe force microscopy. Cu–ZrO2–MMCsfeature a retarded fatigue crack initiation and an earlier crack closure duringfatigue crack growth due to the volume expansion once ZrO2transforms.

AB - In composites, outstanding properties of two materials can be combined. Inparticular, metal–matrix composites (MMCs) can combine the properties of ahigh-strength ductile metallic matrix with special properties of embeddedceramic particles. This hybrid can be used to create a functional material.However, during consolidation, the thermal load of most common MMC-processing routes is an obstacle for such functionalization, because the uniqueproperties of the ceramic phases most likely degrade. Mechanical alloying, in thiscase, by high-pressure torsion (HPT), can overcome this challenge. Herein, theattempt to obtain smart materials through HPT processing is aimed. For thatpurpose, Cu-MMCs are produced from mixed powders with ZrO2and BaTiO3(BTO) with the challenge to incorporate their functional phase. BTO can providea sensing ability for internal stress and ZrO2can provide a fatigue lifetime by aretarded crack growth. The amount of the stabilized phase is evaluated by X-raydiffraction. Cu–BTO–MMCs exhibit a local piezoelectric effect when strained,shown by in situ scanning Kelvin probe force microscopy. Cu–ZrO2–MMCsfeature a retarded fatigue crack initiation and an earlier crack closure duringfatigue crack growth due to the volume expansion once ZrO2transforms.

KW - hybrid materials

KW - intelligent materials

KW - metal–matrix composites

KW - smart materials

UR - http://www.scopus.com/inward/record.url?scp=85149033223&partnerID=8YFLogxK

U2 - 10.1002/adem.202201565

DO - 10.1002/adem.202201565

M3 - Article

AN - SCOPUS:85149033223

VL - 25.2023

JO - Advanced Engineering Materials

JF - Advanced Engineering Materials

SN - 1438-1656

IS - 20

M1 - 2201565

ER -