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Journal of Ceramic Science and Technology 1/2026
Vol. 17, No. 1 · February 2026
Effect of SrO Precursors on the Microstructure and Mechanical Properties of Zirconia-Toughened Alumina (ZTA) Composites
In this study, ZTA (3Y-TZP/Al2O3) ceramic composites with added SrO sintering aid from SrCO3 and Sr(NO3)2 precursors were prepared by means of pressureless sintering and hot isostatic pressing sintering (HIPing). The microstructure and mechanical properties of the ZTA ceramic composites with added SrCO3 and Sr(NO3)2 were examined, respectively. It was found that SrO incorporation inhibited grain growth and induced the in situ formation of SrAl12O19 platelets. As the SrO content increased, the fracture toughness of the ceramic composites improved; additionally, the hardness and flexural strengt …
Electrochemical Deposition of Ni-Zn Oxide Coatings on Roll Knife Surfaces: Process Parameters and Performance Effects
Quangang Li, Jianbo Zhou, Xiaohong Wang
Pages 71-82 · DOI: 10.4416/JCST2025-00020
An innovative electrodeposition method was developed to fabricate Ni-ZnO composite coatings on high-carbon stainless steel substrates for industrial cutting applications. In this study, key deposition parameters including current density (ranging from 2 to 8 A/dm2), bath pH (optimally maintained at 10), temperature (45 °C), and stirring rate (250 rpm) were systematically optimized to enhance coating properties. The integration of ZnO nanoparticles resulted in a refined microstructure, reducing the average grain size from 0.72 µm to 0.56 µm, while the coating thickness increased from 11.1 µm at …
Aqueous-Oxygen Corrosion Damage of 2.5D Braided SiCf/SiC Composites Prepared by CVI+PIP Processing: Multidimensional Observation and Mechanism Analysis
Zhang Lin, Zhang Lin, Li Junsheng, Chen Sian, Zhang Yanhu, Wan Fan
Pages 39-52 · DOI: 10.4416/JCST2025-00006
X-ray computed tomography (XCT) was utilized to perform quantitative and qualitative characterizations of aqueous-oxygen corrosion evolution in SiCf/SiC composites under pre- and post-oxidation conditions. The results indicate that the SiC matrix formed with the precursor impregnation and pyrolysis (PIP) method is located mainly in the inter-bundle region, which experiences significant oxidation after 160 hours of oxidation. This oxidation results in the formation of SiO2 that fills the inter-bundle pores, leading to a decrease in porosity from an initial 10.9 % to 6.8 %. The interconnected in …
Effect of As-Cast Al2O3 Nanoparticles on Dynamic Recrystallization Behavior and Mechanical Properties of Mg-Gd-Y Alloy
Yan-Qiong Ma, Shuang Han, He Ma, Jian-She Lian
Pages 83-92 · DOI: 10.4416/JCST2025-00022
This study investigates the influence of as-cast γ-Al2O3 nanoparticles on the dynamic recrystallization and mechanical properties of an Mg-10Gd-3Y alloy. Alumina nanoparticles (∼ 35 nm), synthesized via a green method using Mentha pulegium extract, were incorporated into the Mg alloy by means of stir-casting followed by extrusion. Microstructural characterization revealed uniform nanoparticle dispersion and grain refinement from 10.2 µm to 6.1 µm, accompanied by weakened basal texture. X-ray photoelectron spectroscopy confirmed strong interfacial bonding, with Al2O3-related peaks at 74.8 eV an …
Influence of Er: YAG Laser, and Radachlorin-Activated Low-Level Laser Therapy on the Contact Angle, Surface Topography, and Shear Bond Strength of Lithium Disilicate Ceramics and Resin-Based Ceramics
A. Barakat, S. AbdulRahman AlTowayan, N.H. Shaheen, A.M. Elmarakby, A.M. Elmarakby, K.A. Rayes, M. Mahmood
Pages 93-100 · DOI: 10.4416/JCST2025-00024
To assess the influence of surface conditioners, i.e. hydrofluoric acid (HFA), Er: YAG laser, and Radachlorin-activated low-level laser therapy (LLLT), on the contact angle (CA), surface topography, and shear bond strength (SBS) of lithium disilicate ceramics (LDC) and resin-based ceramics (RBC). RBC Lava Ultimate (Group A) and IPS Emax (Group B) were used to obtain forty-five discs in each case. Each group was further divided into subgroups based on the conditioning protocol used. Group 1: HFA, Group 2: Er: YAG laser, and Group 3: LLLT (RD). CA (n = 2) and surface topography analysis (n = 3) …
Porous Ceramic Microspheres for Enhancing Acoustic Absorption of Polyurethane Foams in Automotive NVH Control
Qiong Yuan, Shisheng Li
Pages 1-16 · DOI: 10.4416/JCST2025-00026
Addressing the persistent challenge of lightweight automotive NVH control, this review critically assesses advances in embedding porous ceramic microspheres into polyurethane foams, establishing their efficacy as a high-performance, low-density solution for acoustic packages. We quantify the mechanistic interplay between visco-inertial and thermal losses and key microstructural levers – open porosity, flow resistivity, tortuosity, and cell size/distribution – demonstrating how these hollow inclusions nucleate finer, more uniform cells and introduce crucial internal interfaces, optimizing acous …
Machine-Learning-Assisted Micro-CT and Multimodal Imaging for Osseointegration Assessment of Zirconia Ceramic Implants: Linking Processing, Microstructure, and In-Vivo Performance
Ya Qiu, Yang Liu, Ke Zheng
Pages 17-32 · DOI: 10.4416/JCST2025-00027
The transition from titanium to zirconia implants represents a paradigm shift in restorative dentistry, driven by aesthetic demands, biocompatibility concerns, and the need for enhanced long-term stability. This review critically evaluates the processing-microstructure-performance nexus of zirconia ceramics, emphasizing how sintering parameters, phase stability, and surface modifications collectively determine mechanical reliability and biological integration. The unique phenomenon of transformation toughening provides zirconia with competitive strength, yet susceptibility to low-temperature d …
The Effect of BN Content on the Thermal Expansion Properties of SiC Composite Ceramics
Weijing Kong, Bin Hu
Pages 33-38 · DOI: 10.4416/JCST2024-00035
Silicon carbide (SiC) ceramics are a novel packaging material that has demonstrated significant potential in the field of electronic packaging in recent years. In this study, SiC composite ceramics were prepared using a pressureless liquid-phase sintering method with Al2O3-Y2O3-MgO-BN as sintering additives. The influence of the BN content on the thermal properties of SiC composite ceramics was investigated, with the aim of exploring the performance advantages of SiC composite ceramics in packaging applications. The results indicate that the main crystalline phase of all samples is 6H-SiC, wit …
Effects of B2O3-V2O5 on Sinterability and Microwave Dielectric Properties of (Mg1-xCux)2SiO4 Ceramics
Chengxi Hu, Xiechao Hu, Ze Qing Guo, Amanda Ekeminiabasi Williams
Pages 101-106 · DOI: 10.4416/JCST2025-00018
The crystal structure, microstructure, and microwave dielectric properties of B2O3-V2O5 co-doped (Mg1-xCux)2SiO4 (x=0.05 – 0.20) ceramics were investigated. The sintering temperature was successfully reduced to about 1 250 °C/4 h for the B2O3-V2O5 co-doped (Mg1-xCux)2SiO4 specimens. The (Mg0.95Cu0.05)2SiO4 with 6 wt% B2O3 – 6 wt% V2O5 ceramics sintered at 1 250 °C for 4 h achieved excellent microwave dielectric properties of εr = 6.55, Q·ƒ = 37 500 GHz and a τƒ of - 35.65 ppm/K.
Influence of the Surface Modification of Lithium Disilicate Ceramics with Er, Cr: YSGG, and Nd:YAG Laser on Surface Properties, Roughness, and Bond Strength Bonded to Light- and Dual-Cure Cements
K.A. Al Aali
Pages 63-70 · DOI: 10.4416/JCST2025-00017
The influence of hydrofluoric acid (HFA), Er, Cr: YSGG laser (ECL), Nd:YAG laser (NdYL) on the surface roughness (Ra), characterization, and shear bond strength of lithium disilicate ceramics (LDC) bonded to light cure (LC) and dual-cure (DC) resin cement was studied. 78 LDC discs were fabricated with the CAD-CAM technique. Samples were categorized into cohorts based on conditioning protocol: Group 1-HFA, Group 2-ECL, and Group 3-NdYL. Assessment of Ra and surface characterization was conducted using a profilometer and SEM. Twenty samples from each group were subdivided into two subgroups. Lig …
