Effects of layer thickness ratio on residual stress, microstructure and mechanical properties of TiB2-TiC/TiB2-TiN laminated ceramics

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2024-11-21 DOI:10.1007/s10853-024-10117-5

Zongzhe Yang, Jiaojiao Gao, Jinpeng Song, Yao Wang

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Abstract

TiB₂-TiC/TiB₂-TiN (TC/TN) laminated ceramics were fabricated, and effects of layer thickness ratio (LTR) on their residual stress, microstructure and mechanical properties were investigated. Residual compressive stress (RCS) and residual tensile stress distributed alternately with the alternation of TC and TN; with an increase in the LTR, the RCS decreased. The fracture mode of the ceramic consisted of transgranular fracture and intergranular fracture. Compared with the TN, the TC had less micro-void defects. With the LTR increasing, the fracture mode of the TC or TN was almost unchanged, and the variation of the number of microdefects was small; Vickers hardness (VH) and fracture toughness (FT) declined, while flexural strength (FS) first improved and then declined; at the same LTR, the TC had better VH and FT than the TN. When the LTR was 0.75, this ceramic had better comprehensive mechanical properties: VH of the TC and TN was 20.9 ± 0.2 GPa and 16.3 ± 0.3 GPa, respectively; FT of the TC and TN was 6.5 ± 0.1 MPa·m^1/2 and 6.1 ± 0.2 MPa·m^1/2, respectively; and FS was 748 ± 12 MPa. For TiB₂-based ceramics, this research to a certain extent played a great role on the road of exploration for improving their properties.

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.