Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1016/j.rinp.2021.103843
Ключевые слова: metal matrix composites (mmcs), intermediate valence systems, negative thermal expansion, invar alloys
Аннотация: This work is focused on the fabrication and characterization of a new type of composite invar materials combining near-zero thermal expansion and functional properties that are important for applications. This is accomplished through the use of particles of SmB6, an intermediate valence system with negative thermal expansion, embedПоказать полностьюded in Al matrix. The composite based on SmB6-21 vol% was fabricated by hot pressing and was characterized by XRD, optical/electron microscopy, X-ray computed tomography and capacitive dilatometry. The study of thermal expansion revealed that the sample exhibits invar behaviour up to similar to 60 K with a zero value of the coefficient of thermal expansion near 45 K. In comparison to pure aluminum, the temperature range has increased by about 20 K. A quantitative analysis of dilatometric experimental data performed on the basis of widely used theoretical models showed that the thermal expansion of the Al/SmB6 composite was well reproduced within the Turner model.
Журнал: RESULTS IN PHYSICS
Выпуск журнала: Vol. 21
Номера страниц: 103843
ISSN журнала: 22113797
Место издания: AMSTERDAM
Издатель: ELSEVIER