A transmission electron microscopy study of WC-10Co cemented carbides with modified hard and binder phases

Journal Article · Tue Mar 31 23:00:00 EST 1992 · Materials Performance; (United States)

DOI:https://doi.org/10.1016/1044-5803(92)90085-V· OSTI ID:5577376

Bhaumik, S K; Upadhyaya, G S; Vaidya, M L ^[1]

---

1. Dept. of Metallurgical Engineering, Indian Inst. of Technology, Kanpur-208016 (IN)

This paper reports on the alloy design of WC-10Co cemented carbide, modified with addition of a hard carbide phase, TiC, and with Ni and Mo in the binder phase, that has been highlighted by the authors in a number of publications. The present article deals with the fine microstructural features of various phases in such cemented carbides. WC grains in all the investigated cemented carbide compositions appear to develop straight facets during sintering because of their anisotropic nature. In contrast, the TiC phase is characterized by its rounded shape. Dislocations are present in both WC and TiC grains, being of lesser density in the latter. The binder phase is always associated with stacking faults. The nature of the hard phase/binder interfaces has been found to be dependent on the binder phase chemistry. The observed changes in microstructures and mechanical properties have been correlated with the wettability and solubility of the hard phases in the binder melt, and with the different strengthening mechanisms in the binder phase.

• OSTI ID: 5577376
• Journal Information: Materials Performance; (United States), Journal Name: Materials Performance; (United States) Vol. 28:3; ISSN 0094-1492; ISSN MTPFB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
661200 -- Techniques of General Use in Physics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CARBIDES
CARBON COMPOUNDS
CEMENTING
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DESIGN
ELECTRON MICROSCOPY
FABRICATION
INTERFACES
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PHASE STUDIES
SINTERING
SOLUBILITY
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
WETTABILITY