Compressive deformation behaviour and toughening mechanisms of spark plasma sintered NiAl-CNT composites

被引：15

作者：

Awotunde, Mary A. ^{[1
,2
]}

Olubambi, Peter A. ^{[1
]}

Chen, Daolun ^{[2
]}

机构：

[1] Univ Johannesburg, Ctr Nanoengn & Tribocorros, Sch Min Met & Chem Engn, Johannesburg, South Africa

[2] Ryerson Univ, Dept Mech & Ind Engn, Toronto, ON M5B 2K3, Canada

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

Nickel aluminide; Carbon nanotubes; Spark plasma sintering; Compressive deformation; Bimodal microstructure; Toughening mechanism; MULTIWALLED CARBON NANOTUBES; IN-SITU SYNTHESIS; STRENGTHENING MECHANISMS; GRAPHENE NANOPLATELETS; INTERMETALLIC COMPOUND; MATRIX NANOCOMPOSITES; HARDENING BEHAVIOR; BALANCED STRENGTH; NICKEL ALUMINIDE; LOAD-TRANSFER;

D O I：

10.1016/j.ceramint.2022.02.153

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：

Carbon nanotube (CNT)-reinforced NiAl intermetallic composites were produced via powder metallurgy, particularly spark plasma sintering. The aim of this study was to evaluate the room temperature compressive behaviour of the sintered NiAl-CNT composites with a focus on the toughening mechanisms of the CNT reinforcement and the resulting microstructures. Remarkably, the NiAl-0.5 wt% CNT composites exhibited a balanced combination of strength and toughness despite a trade-off tendency, due to the presence of both coarse and fine bimodal grains in its microstructure. Mechanical properties of 831 MPa, 429 MPa and 360 HV were recorded for the ultimate compressive strength (UCS), compressive yield strength (CYS) and microhardness of the NiAl-0.5%CNT intermetallic composites, respectively, along with a compressive strain of 12% being higher than the unreinforced NiAl.

引用

页码：16072 / 16084

页数：13

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