4)6Mo7O24.4H2O)、硝酸銅(Cu(NO3)2.3H2O)、甘氨酸和乙二胺為原料采用甘氨酸硝酸鹽法(GNP)法制備前驅(qū)體粉末,再經(jīng)過(guò)700℃氫氣還原得到Mo-20Cu復(fù)合粉末,經(jīng)壓制后在1150℃于不同壓力下進(jìn)行熱壓燒結(jié),研究不同壓力對(duì)鉬銅合金燒結(jié)體性能的影響。結(jié)果表明：GNP-H2還原法可以制備出平均晶粒尺寸為70 ~80nm且大小均勻,分散性優(yōu)異的球形Mo-Cu納米復(fù)合粉末,經(jīng)加壓燒結(jié)致密度達(dá)到99.7%,各相組織分布均勻,且在一定的范圍內(nèi)壓力增大可以使燒結(jié)體硬度、電導(dǎo)率和熱導(dǎo)率有所增大。"/>

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壓力對(duì)熱壓燒結(jié)制備Mo-20Cu復(fù)合材料的影響
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中南大學(xué) 材料科學(xué)與工程學(xué)院,中南大學(xué) 材料科學(xué)與工程學(xué)院,中南大學(xué) 材料科學(xué)與工程學(xué)院,中南大學(xué) 材料科學(xué)與工程學(xué)院,中南大學(xué) 材料科學(xué)與工程學(xué)院

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國(guó)家自然科學(xué)基金資助項(xiàng)目(51274246)；湖南省自然科學(xué)基金資助項(xiàng)目(2015JJ2170)；中南大學(xué)粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室開放課題基金資助項(xiàng)目(10500-410500023)


Effects of pressure on preparation of Mo-Cu alloy by hot-press sintering
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School of Material Science and Engineering,Central South University,School of Material Science and Engineering,Central South University,School of Material Science and Engineering,Central South University,School of Material Science and Engineering,Central South University,School of Material Science and Engineering,Central South University

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    摘要:

    以仲鉬酸銨((NH4)6Mo7O24.4H2O)、硝酸銅(Cu(NO3)2.3H2O)、甘氨酸和乙二胺為原料采用甘氨酸硝酸鹽法(GNP)法制備前驅(qū)體粉末,再經(jīng)過(guò)700℃氫氣還原得到Mo-20Cu復(fù)合粉末,經(jīng)壓制后在1150℃于不同壓力下進(jìn)行熱壓燒結(jié),研究不同壓力對(duì)鉬銅合金燒結(jié)體性能的影響。結(jié)果表明：GNP-H2還原法可以制備出平均晶粒尺寸為70 ~80nm且大小均勻,分散性優(yōu)異的球形Mo-Cu納米復(fù)合粉末,經(jīng)加壓燒結(jié)致密度達(dá)到99.7%,各相組織分布均勻,且在一定的范圍內(nèi)壓力增大可以使燒結(jié)體硬度、電導(dǎo)率和熱導(dǎo)率有所增大。

    Abstract:

    The precursor powders were successfully prepared by GNP method with Ammonium molybdate((NH4)6Mo7O24.4H2O), Cupric nitrate(Cu(NO3)2.3H2O), Glycine and Ethylene diamine, followed by reducing in H2 at 700℃ to convert into Mo-20Cu powders. Effects of different pressure on sintering body of Mo-Cu alloy that sintered at 1150℃ were studied. The results show that the nano-powders which is fine with size of 70~80nm can be prepared by GNP-H2 reduction method. The relative density of Mo-Cu compact sintered at 1150℃ can achieve 99.7% of the theoretical and the microstructure of the compact distributes homogenously. With increase of pressure, the hardness, electrical conductivity and thermal conductivity will be enhanced with limit.

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王德志,李然,段柏華,孫翱魁,尹邦柱.壓力對(duì)熱壓燒結(jié)制備Mo-20Cu復(fù)合材料的影響[J].稀有金屬材料與工程,2017,46(7):1998~2001.[WANG Dezhi, LI Ran, DUAN Bohua, SUN Aokui, YIN Bangzhu. Effects of pressure on preparation of Mo-Cu alloy by hot-press sintering[J]. Rare Metal Materials and Engineering,2017,46(7):1998~2001.]
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  • 收稿日期:2015-03-23
  • 最后修改日期:2015-04-29
  • 錄用日期:2015-06-11
  • 在線發(fā)布日期: 2017-11-14
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