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- Title
Preparation of High‐Performance WC–MgO Composites by Spark Plasma Sintering.
- Authors
Qin, Jiayu; Hui, Jiaqi; Dong, Weiwei; Bai, Yunfeng; Fan, Jinhui; Ding, Hao; Zhu, Shigen
- Abstract
Herein, tungsten carbide (WC)–4.3 wt% MgO composite powders are synthesized by high‐energy planetary ball milling method and then consolidated by spark plasma sintering (SPS). Submicrometer WC–MgO composite powders are consolidated to obtain a nearly complete density of WC–MgO composites (99.15%). The nanosized MgO distributed along the WC grains in WC–MgO composite plays an important role of dispersion strengthening and achieving high flexural fracture strength of WC–MgO composites (1348 MPa). As the addition of MgO increases the interfacial strength, the fracture mode of WC–MgO composites is mainly a mixture of transgranular fracture and intergranular fracture. High value on Vickers hardness (1660HV) and fracture toughness (9.37 MPa m1/2) of WC–MgO are also observed due to the crack deflection and crack bridging. Binderless WC–MgO composites have similar properties to WC–Co and are expected to replace WC–Co hard metal for saving resources and reducing cost.
- Subjects
SINTERING; VICKERS hardness; FRACTURE strength; BRITANNIA metal; FRACTURE toughness; POWDERS
- Publication
Advanced Engineering Materials, 2022, Vol 24, Issue 12, p1
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.202200625