Work

Regulation of GNPs on YSZ composites: Phase transformation, microstructures and nanomechanical properties

Year: 2025

Type: article

Abstract: It is one of the big bottleneck problems for graphene to be uniformly distributed in ceramic matrix composites. A two-step approach was applied to prepare Graphene Nanoplatelets/Yttria-Stabilized Zirconia (GNPs/YSZ) composites. Initially, GNPs were combined with YSZ through nanoparticle regranulation technology to obtain uniformly dispersed powders. Subsequently, the prepared powders were sintered by Spark Plasma Sintering (SPS). Systematic investigation was carried out to examine how GNPs regulate the phase, microstructures, and nanomechanical properties of GNPs/YSZ composite ceramics with different sintering temperatures. Results show that the GNPs can inhibit the coalescence of adjacent grains in YSZ ceramics. Herein, we propose that the intensity ratio of 2D peak to G peak of GNPs in Raman spectrum serves as a key indicator to assess the nanomechanical properties of GNPs/YSZ composites. When the intensity ratio of 2D peak to G peak is 0.5–0.6, the GNPs/YSZ composites obtained in the sintering temperature range of 1 200–1 250 °C exhibit excellent nanomechanical properties such as hardness, elastic modulus, wear and creep resistance.

Source: Chinese Journal of Aeronautics

DOI: 10.1016/j.cja.2025.103541

Authors: Chenkun SUN, Xiaodong ZHANG, Hongzhi JI, Yiyong WU, Oleg V. TOLOCHKO, You WANG

Institutions: Harbin Institute of Technology, China State Shipbuilding (China), Peter the Great St. Petersburg Polytechnic University

Language: English

Topic: Advanced ceramic materials synthesis

Subfield: Ceramics and Composites

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,000

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China, National Major Science and Technology Projects of China