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Transient Liquid-Phase Sintering Characteristic of W-Ni-Fe Alloy via Microwave-Assisted Heating
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Transient Liquid-Phase Sintering Characteristic of W-Ni-Fe Alloy via Microwave-Assisted Heating
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National Natural Science Foundation of China (50774098); Creative Research Group of National Natural Science Foundation of China (50721003)

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    摘要:

    研究了W-Ni-Fe合金在2.45 GHz微波爐中瞬時(shí)液相燒結(jié)的致密化行為和力學(xué)性能。結(jié)果表明：微波輔助熱場(chǎng)下的93W-Ni-Fe合金顯示出優(yōu)異的力學(xué)性能和快速的致密化過程，其壓縮試樣在1500 ℃下燒結(jié) 5 min后，拉伸強(qiáng)度、延伸率、相對(duì)密度和硬度(HRC)分別是1200 MPa, 16.6%, 98.6% 和42.0；在微波輔助熱場(chǎng)下，試樣燒結(jié)可以減少80%的燒結(jié)時(shí)間；微波輔助熱場(chǎng)下的瞬時(shí)液相燒結(jié)有利于減少燒結(jié)時(shí)間，加快致密化過程，并且有利于鎢晶粒的細(xì)化，獲得組織均勻和綜合性能高的W-Ni-Fe合金

    Abstract:

    The transient liquid-phase densification behavior and the mechanical performance of W-Ni-Fe alloy were investigated. This results show that the excellent mechanical properties and the quick densification of 93W-Ni-Fe alloy can be obtained via the microwave-assisted sintering approach in a 2.45 GHz microwave furnace. The tensile strength, the elongation, the relative density and the hardness (HRC) of samples are 1200 MPa, 16.6%, 98.6% and 42.0, respectively after the compacts are sintered at 1500 oC for only 5 min. The compacts can be successfully sintered in a microwave furnace with above 80% reduction in the overall processing time. Transient liquid-phase sintering by microwave-assisted heating is beneficial to saving of a lot of sintering time and accelerating of densification process, which results in W grains refinement, homogeneous microstructure and high comprehensive performances of W-Ni-Fe alloy

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馬運(yùn)柱,張佳佳,劉文勝,趙亞旭. Transient Liquid-Phase Sintering Characteristic of W-Ni-Fe Alloy via Microwave-Assisted Heating[J].稀有金屬材料與工程,2014,43(9):2108~2111.[Ma Yunzhu, Zhang Jiajia, Liu Wensheng, Zhao Yaxu. Transient Liquid-Phase Sintering Characteristic of W-Ni-Fe Alloy via Microwave-Assisted Heating[J]. Rare Metal Materials and Engineering,2014,43(9):2108~2111.]
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  • 收稿日期:2013-09-20
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  • 在線發(fā)布日期: 2015-02-25
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