NbMoCrTiAl High-entropy Alloy Prepared by Mechanical Alloying and Spark Plasma Sintering

被引：0

作者：

Yan J. ^{[1
,2
,3
]}

Li K. ^{[1
]}

Wang Y. ^{[1
,2
,3
]}

Qiu J. ^{[1
,2
,3
]}

机构：

[1] College of Materials Science and Technology, Hunan University of Science and Technology, Xiangtan

[2] Hunan Provincial Key Defense Laboratory of High Temperature Wear resisting Materials and Preparation Technology, Hunan University of Science and Technology, Xiangtan

[3] Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan

来源：

Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Entropy alloy; Mechanical alloying; NbMoCrTiAl; Spark plasma sintering;

D O I：

10.11896/cldb.18020113

中图分类号：

学科分类号：

摘要：

The effects of ball milling speed, ball-to-powder ratio and milling duration on the phase, morphology and particle size of NbMoCrTiAl high entropy alloy powders were investigated. The microstructure and hardness of NbMoCrTiAl high-entropy alloys prepared at different spark plasma sintering temperatures were investigated. The results indicated that incomplete alloying of powders occurred at the rotational speed of 300 r/min, ball-to-powder ratio of 10:1 and milling duration of 60 h. Only the ball-to-powder ratio reached 12:1 under the milling conditions of 300 r/min and 50 h can complete alloying of powders be achieved. Moreover, NbMoCrTiAl high entropy alloy with single BCC solid solution could be obtained on condition that the ball milling speed exceeded 400 r/min, with the ball-to-powder ratio of 10:1 and milling duration of 50 h. The alloying sequence of elements in NbMoCrTiAl high entropy alloy was Al→Ti→Cr→Nb→Mo. The precipitation and dissolution change of the second phases occurred in NbMoCrTiAl high entropy alloy during the SPS process. With the rising sintering temperature(1 400-1 600℃), the second phases presented a decrease in number and an increase in size, which leaded to the gradual reduction of hardness. © 2019, Materials Review Magazine. All right reserved.

引用

页码：1671 / 1675

页数：4

共 22 条

[1]

Wang S.P., Xu J., Materials Science & Engineering C, 73, (2017)

[2]

Chen Y.X., Zhu S., Wang X.M., Et al., Journal of Materials Engineering, 45, 11, (2017)

[3]

Fu X., Schuh C.A., Olivetti E.A., Scripta Materialia, 45, 138, (2017)

[4]

Juan C.C., Tsai M.H., Tsai C.W., Et al., Intermetallics, 45, 62, (2015)

[5]

Senkov O.N., Scott J.M., Senkova S.V., Et al., Journal of Alloys & Compounds, 509, 20, (2011)

[6]

Chen H., Kauffmann A., Gorr B., Et al., Journal of Alloys & Compounds, 509, 661, (2016)

[7]

Senkov O.N., Senkova S.V., Miracle D.B., Et al., Materials Science & Engineering A, 565, 5, (2013)

[8]

Senkov O.N., Miracle D.B., Journal of Alloys & Compounds, 658, 1, (2016)

[9]

Gao M.C., Carney C.S., Dogan O.N., Et al., JOM, 67, 11, (2015)

[10]

Ji W., Wang W., Wang H., Et al., Intermetallics, 67, 56, (2015)

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