Processing–microstructure–transport correlations in Y-358 ceramics: Effects of low-level Co substitution under optimized thermal conditions

Arebat, Ryad Alhadei Mohamed; Kechik, Mohd Mustafa Awang; Hong, Yap Siew; Dihom, Mustafa Mousa; Yazid, Moftah Ben; Kien, Chen Soo; Pah, Lim Kean; Karim, Mohd Khalis Abdul; Zaid, Mohd Hafiz Mohd; ÖZTÜRK, Özgür

doi:10.1016/j.jmrt.2025.12.212

Processing–microstructure–transport correlations in Y-358 ceramics: Effects of low-level Co substitution under optimized thermal conditions

Yazarlar (10)

Ryad Alhadei Mohamed Arebat
Universiti Putra Malaysia, Malezya

Mohd Mustafa Awang Kechik
Universiti Putra Malaysia, Malezya

Yap Siew Hong
Universiti Putra Malaysia, Malezya

Mustafa Mousa Dihom
Alasmarya Islamic University, Libya

Moftah Ben Yazid
Alasmarya Islamic University, Libya

Chen Soo Kien
Universiti Putra Malaysia, Malezya

Lim Kean Pah
Universiti Putra Malaysia, Malezya

Mohd Khalis Abdul Karim
Universiti Putra Malaysia, Malezya

Mohd Hafiz Mohd Zaid
Universiti Putra Malaysia, Malezya

Prof. Dr. Özgür ÖZTÜRK Kastamonu Üniversitesi, Türkiye

Makale Türü	Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı	Journal of Materials Research and Technology (Q1)
Dergi ISSN	2238-7854 Wos Dergi Scopus Dergi
Makale Dili	İngilizce	Basım Tarihi	03-2026
Cilt / Sayı / Sayfa	41 / 1 / 1716–1726	DOI	10.1016/j.jmrt.2025.12.212
Makale Linki	https://doi.org/10.1016/j.jmrt.2025.12.212

Özet

This study examines the processing–microstructure–transport relationships in Y3Ba5Cu8-xCoxO18-δ (Y-358) bulk ceramics synthesized via the solid-state reaction method, with emphasis on the influence of low-level cobalt substitution (x = 0.00–0.05). X-ray diffraction confirmed the orthorhombic Y-358 phase for all compositions. Microstructural analysis showed that light Co substitution (x = 0.01–0.03) improved grain alignment and densification, promoting stronger intergranular contact, whereas excessive substitution (x = 0.05) introduced porosity, microcracks, and disrupted grain connectivity. Electrical resistivity measurements revealed superconducting transitions across all samples, with the undoped composition exhibiting T c-onset ∼93 K and T c-zero ∼86 K. The optimally substituted sample (x = 0.03) demonstrated enhanced grain connectivity and a sharp single-step transition, indicating well-established intergranular coupling. Magnetic hysteresis measurements at 20 K further verified enhanced flux pinning for this composition, yielding a critical current density of 28.25 kA/cm² compared with 21.20 kA/cm² for the undoped sample (∼33 % improvement). These findings demonstrate that controlled low-level Co substitution, combined with optimized thermal processing, provides an effective route to improve phase stability, microstructural refinement, flux pinning, and current-carrying capability in Y-358 ceramics, offering a practical pathway for advancing cuprate superconductor performance.

Anahtar Kelimeler

Co-substitution | Critical current density | Microstructure evolution | Superconducting transport | Y-358 ceramic

Pdf İndir

Science Direct

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
Scopus	1

Processing–microstructure–transport correlations in Y-358 ceramics: Effects of low-level Co substitution under optimized thermal conditions

Dergi Adı	Journal of Materials Research and Technology-JMR&T
Yayıncı	Elsevier Editora Ltda
Açık Erişim	Evet
ISSN	2238-7854
E-ISSN	2214-0697
CiteScore	9,5
SJR	1,318
SNIP	1,749

Processing–microstructure–transport correlations in Y-358 ceramics: Effects of low-level Co substitution under optimized thermal conditions

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