Development of Al-TiCN nanocomposites via ultrasonic assisted casting route

被引：16
作者：
Wang, K. [1 ,2 ]
Xu, G. P. [1 ,2 ]
Jiang, H. Y. [1 ,2 ]
Wang, Q. D. [1 ,2 ]
Ye, B. [1 ,2 ]
Ding, W. J. [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys, Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composite, Shanghai 200240, Peoples R China
来源：
ULTRASONICS SONOCHEMISTRY | 2019年 / 58卷
基金：
中国国家自然科学基金;
关键词：
Nanoparticle; Nanocomposite; Cooling rates; Ultrasonic dispersion; MATRIX COMPOSITES; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; HAMAKER CONSTANT; PART I; ALUMINUM; SIZE; MICROSTRUCTURE; NANOPARTICLES; PARTICLES;
D O I：
10.1016/j.ultsonch.2019.104626
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
This work provides a promising approach to achieve the uniform distribution of TiCN nanoparticles (NPs) in aluminum matrix via a combination of ultrasonic dispersion and fast cooling processing. Microstructure analysis demonstrates that as the cooling rate is increased, the NP distribution in the matrix varies from intergranular to intragranular at micro scale and the NP-matrix interface from incoherent to coherent at nano scale. An analytical model is proposed to unveil the effects of cooling rates on the behavior of NPs at the solidification front. The theoretical analysis reveals that the NP size and cooling rate are the two prominent factors determining the NP distribution during solidification of nanocomposites. The experimental results yield an insight into the understanding of NP-induced microstructural evolution and shed new light on the development of high-performance nanocomposites.
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页数：10
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