期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 35, 期 -, 页码 138-142出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2012.05.004
关键词
W-Ni-Fe alloy; Microwave sintering; Microstructural evolution
资金
- National Natural Science Foundation of China [50774098]
- Creative research group of National Natural Science Foundation of China [50721003]
The mechanical properties and microstructure evolution of 93W-4.9Ni-2.1Fe (wt.%) alloys were investigated via microwave sintering. The microwave sintering promoted the dissolution and diffusion of tungsten atoms in the matrix phase and strengthened sintering activity. With the increase of microwave sintering temperature, pores in the alloy were reduced and gradually eliminated, tungsten grains coarsened, the distribution of tungsten grains and matrix phase became more homogeneous, and the fracture mode transformed from intergranular fracture to tungsten transgranular cleavage fracture, respectively. The W-matrix interfacial bond strength of 93W-4.9Ni-2.1Fe was enhanced and the mechanical properties were significantly improved with the increase of sintering temperature. (C) 2012 Elsevier Ltd. All rights reserved.
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