Interfacial reaction between ZrNbHfTa foil and graphite: Formation of high-entropy carbide and the effect of heating rate on its microstructure

被引：24

作者：

Biesuz, Mattia ^{[1
,2
]}

Saunders, Theo G. ^{[1
]}

Chen, Kan ^{[1
]}

Bortolotti, Mauro ^{[2
]}

Salvo, Milena ^{[3
]}

Grasso, Salvatore ^{[4
]}

Reece, Michael J. ^{[1
]}

机构：

[1] Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England

[2] Univ Trento, Dept Ind Engn, Via Sommarive 9, I-38123 Trento, Italy

[3] Politecn Torino, Dept Appl Sci & Technol, I-10129 Turin, Italy

[4] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2020年 / 40卷 / 07期

关键词：

High-entropy; High-entropy carbide; Flash sintering; Spark plasma sintering; Joining; PLASMA SINTERING FSPS; MECHANICAL-PROPERTIES; TEXTURE ANALYSIS; PHASE-STABILITY; FLASH; TEMPERATURE; ZIRCONIA; CERAMICS; OXIDE; CONDUCTIVITY;

D O I：

10.1016/j.jeurceramsoc.2019.12.011

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The interfacial reaction between graphite and a ZrNbHfTa foil was investigated using a spark plasma sintering (SPS) machine. The interlayer was converted during the treatment into a high-entropy carbide by the reaction between the alloy and the graphite substrate. The degree of conversion depended on the processing time and temperature, but could be completed in only 16 s using the flash-spark plasma sintering process. The final microstructure was strongly influenced by the heating rate. Flash-SPS processing (heating rate about 120 degrees C/s) melted the alloy, which was then squeezed and deformed before its conversion to the high-entropy carbide (Zr,Nb,Hf,Ta)C. On the contrary, when conventional heating was used (i.e., 10 degrees C/min) the metal reacted with the graphite substrate before it melted. This concept appears to be generally applicable to different graphite/metal systems, with particular implications in the fields of graphite/metal joining.

引用

页码：2699 / 2708

页数：10

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