Effect of powder feeding rate and size on critical velocity and mechanical properties of cold sprayed Al2O3/2024 deposit

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外文摘要：The particle acceleration behavior and deposition mechanism of cold spraying aluminum matrix composites(Al2O3/2024)are complicated by the addition of ceramic particles.The effects of different feeding rates and particle diameters on critical velocity and mechanical properties were studied by numerical simulation and experiment.The results indicate that as the powder feeding rate increases,the impact velocity of gas and particles gradually decreases,and the temperature of gas and particles increases,resulting in an increase in the difference between particle impact velocity and critical velocity.The highest tensile strength of the deposit is achieved at a powder feed-ing rate of 1 r/min,which is 343 MPa.As the powder feeding rate increases,the performance of the deposits decreases,but it significantly saves time and cost.As the particle diameter increases,the impact temperature first increases and then decreases,resulting in the critical velocity first decreas-ing and then increasing,and the mechanical performance first increasing and then decreasing.To some extent,the best performance of the deposit is achieved when the size of the metal particle is close to that of the ceramic particle.

外文关键词：

Cold sprayAluminum matrix compos-itesCritical velocityFeeding rateParticle sizeMechanical property

作者：

Dong WU、Jiaju ZHANG、Yu SU、Wenya LI、Yaxin XU、Xiawei YANG、Chunjie HUANG

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作者单位：

School of Materials Science and Engineering,East China Jiaotong University,Nanchang,330013,China

State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China

State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China

Shaanxi Key Laboratory of Friction Welding Technologies,Northwestern Polytechnical University,Xi'an 710072,China

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出版年：

2024

DOI：

10.1016/j.cja.2024.09.017

中国航空学报(英文版)

中国航空学会

中国航空学报(英文版)

CSTPCDEI

影响因子：0.847

ISSN：1000-9361

年,卷(期)：2024.37(12)