Preparation of W-Cu nanocomposite powder by hydrogen-reduction of ball-milled W and CuO powder mixture
Preparation of W-Cu nanocomposite powder by hydrogen-reduction of ball-milled W and CuO powder mixture
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DOI：
10.1016/j.matlet.2003.08.035
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发表时间：
2004-03
影响因子：
3
通讯作者：
Dae-gun Kim;Kang-Woon Lee;Sung-Tag Oh;Y. Kim
中科院分区：
文献类型：
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作者：
Dae-gun Kim;Kang-Woon Lee;Sung-Tag Oh;Y. Kim
以W和CuO为原料，采用球磨和氢还原法制备了W - cu纳米复合粉体。球磨20 h后，W的晶粒尺寸约为40 nm。将球磨后的W-CuO混合物在300℃下进行氢还原制备W-Cu纳米复合粉体。还原粉末由纳米级W和Cu颗粒组成。在h2o2气氛中，加热温度1200℃，升温速度10℃/min，烧结1 h，可制得致密的钨铜合金。烧结后的W-Cu复合材料组织均匀，晶粒细。
W–Cu nanocomposite powders were successfully synthesized by the ball-milling and hydrogen-reduction process using W and CuO powders. After the ball-milling of 20 h, the crystalline size of W was measured as about 40 nm. The ball-milled W–CuO mixtures were hydrogen-reduced at temperature of 300 °C to fabricate the W–Cu nanocomposite powder. The reduced powder was composed of nanosized W and Cu particles. Fully densified W–Cu compacts can be fabricated by the sintering at 1200 °C for 1 h with the heating rate of 10 °C/min in H2atmosphere. The sintered W–Cu composites showed homogeneous microstructure with fine grains.