A Novel Approach to Fabricate W-Cu Functionally Graded Materials via Sedimentation and Infiltration Method

Published: 16 February 2021| Version 1 | DOI: 10.17632/w3jvv64xrz.1
Contributor:
Bangzheng Wei

Description

W-Cu composites with continuously gradient distribution of components were successfully prepared by sedimentation and infiltration method. Sedimentation behavior of W particles in the suspension and the influence of PVB content on the distribution of components of W-Cu FGMs was investigated. It is concluded that when the PVB content was 4%, the components were most widely distributed in the W-Cu FGMs, and the distribution of Cu content and W content were 28.03wt%~44.47wt% and 71.97wt%~55.53wt%, respectively. The prepared W-Cu FGMs exhibits high density and thermal conductivities. When PVB content was 4%, the density, thermal conductivity, and electrical conductivity of the W-Cu FGMs are 98.23%, 285 W/(m • K) and 58.3 IACS.

Files

Steps to reproduce

The particle size distribution of W powder was tested by the laser particle size analyzer (Malvern Panalytical, MS2000). Morphology of the green W deposit bodies, the W skeletons, and the prepared W-Cu FGMs were observed by a scanning electron microscope (FE-SEM, Hitachi SU8020), Cu content in different regions in the W-Cu FGMs was investigated by energy-dispersive X-ray spectroscopy (EDS) equipped on FE-SEM. Thermal conductivity of the W-Cu FGM samples was measured by LFA457 thermal conductivity tester (Netzsch, Germany), and density of the sintered W-Cu FGM specimens was tested by the Archimedes’ method. Hardness of the W-Cu FGMs was measured using the Vickers hardness tester (HV120, Jinan Liangong Testing Technology Co., Ltd). Each hardness value was the average of five measurements.

Institutions

Hefei University of Technology

Categories

Alloy

Licence