Enhancing hardness and toughness of WC simultaneously by dispersed ZrO2

Liang, Zhantao; Liu, Xuemei; Zhao, Zhi; Lu, Hao; Wang, Haibin; Liu, Chao; Wang, Mingsheng; Song, Xiaoyan

doi:10.1016/j.msea.2023.144905

Cited by 17 publications

(2 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When oscillatory pressure was applied to the WC grains (region A), the shear deformation between adjacent grains led to a higher concentration of dislocation defects within the grains, and frictional resistance was generated within the lattice when individual dislocations slipped, making it difficult for the grains to undergo plastic deformation. The proliferation of intra‐grain dislocation density could lead to the origin of crack extension 37 . The atoms at the coherent interface had lower interfacial energy and a higher bonding match, resulting in modified defect aggregation at the interface.…”

Section: Resultsmentioning

confidence: 99%

“…The proliferation of intra-grain dislocation density could lead to the origin of crack extension. 37 The atoms at the coherent interface had lower interfacial energy and a higher bonding match, resulting in modified defect aggregation at the interface. The presence of a coherent relationship at the WC/ZrO 2 interface had been reported, resulting in the homogenized strain.…”

Section: Mechanical Properties and Toughening Mechanismsmentioning

confidence: 99%

See 1 more Smart Citation

Ultrafine‐grained WC‐based ceramics prepared via two‐step oscillatory pressure sintering

Sun,

Zhu,

Zhang

et al. 2024

J Am Ceram Soc.

View full text Add to dashboard Cite

Grain growth in ceramic‐based composites during sintering has always been an unavoidable problem. Based on the theory of fine‐grained reinforcement, the concept of rapid densification was coupled with the inhibition of grain growth to fabricate ultrafine‐grained WC‐based ceramics. Herein, by combining two‐step sintering with oscillatory pressure sintering (OPS), a new sintering process—two‐step oscillatory pressure sintering (TSOPS), was used for the preparation of ultrafine‐grained WC‐based ceramics. The comparison of the OPS with the TSOPS validated the feasibility of the strategy in achieving homogeneous and fine‐grained microstructures. The optimum mechanical properties of Vickers hardness, fracture toughness, and flexural strength reached up to 29.56 GPa, 7.97 MPa m1/2 and 1591 MPa, respectively. A developed TSOPS process was proposed and proved to dominate the grain size distribution homogenizing, which contributed to the simultaneous enhancement of mechanical properties of the ceramics.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Mechanical Properties and Toughening Mechanismsmentioning

confidence: 99%