EFFECT OF La2O3 ON LASER SINTERING OF WC-CoP/Cu METAL MATRIX COMPOSITES

Acta Metall Sin

2007, Vol. 43

Issue (9): 968-976 DOI:

Research Articles

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EFFECT OF La2O3 ON LASER SINTERING OF WC-CoP/Cu METAL MATRIX COMPOSITES

Dongdong Gu;Yifu Shen

南京航空航天大学材料科学与技术学院

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Dongdong Gu; Yifu Shen. EFFECT OF La2O3 ON LASER SINTERING OF WC-CoP/Cu METAL MATRIX COMPOSITES. Acta Metall Sin, 2007, 43(9): 968-976 .

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Abstract The effect of rare earth oxide (La2O3) contents on direct laser sintering of WC-10Co particulate reinforced Cu matrix composites was investigated. It shows that using an optimal La2O3 content of 1.0% can refine the laser sintered structure, homogenize the dispersion of reinforcing particulates and improve the particulate/matrix bonding coherence, leading to a high densification of 96.3% theoretical density and a high microhardness of HV0.1403.1. However, an excessive addition of La2O3 above 1.5% results in a decrease in the laser sintering ability. The metallurgical mechanisms of rare earth element in laser sintering of particulate reinforced metal matrix composites were discussed.

Key words: direct metal laser sintering metal matrix composites WC-Co

Received: 10 January 2007

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