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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >In situ formation of Cu-ZrO_2 composites by chemical routes
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In situ formation of Cu-ZrO_2 composites by chemical routes

机译：化学路线原位形成Cu-ZrO_2复合材料

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摘要

Composite of copper and 3 mol percent yttria-stabilized 5 wt. percent zirconia (3-YSZ) have been prepared by hydrogen (P_(H_2) = 0.1 atm) reduction of a homogeneous mixture of equably dispersed CuO and ZrO_2 formed by three chemical processes. In these processes, the 5 percent ZrO_2/Cu nano-composite has been formed in situ by (1) addition of NaOH solution to certain amount of dispersed Cu(NO_3)_2, ZrOCl_2 and Y(NO_3)_3 alcohol solution, following filtration; or (2) by adding ammonia to ZrOCl_2, Y(NO_3)_3 solution, then adding Cu(NO_3)_2 solution to the deposition; (3) the mixture of Zr(OH)_4 and Cu(NO_3)_2-3H_2O, mixing and heating the final composition in the three cases to acquire the blending. And calcined them at 500 deg C for 1 h. The 5 percent ZrO_2/Cu composites were fabricated by quenching and final sintering at 900 deg C for 90 min in vacuum atmosphere. The three process were named process A, process B, and process C. The characterization of the composite samples has been done by XRD, SEM, TEM and metallography techniques. Results from XRD and TEM indicated that different crystal structure zirconia was formed in the three processes. In comparison, the composite microstructure of process B was more homogenous. The comparative conductivity and Vickers hardness were 64 percent IACS and 120, which were much higher than the other two processes.
机译：铜和3摩尔百分比的氧化钇稳定的5 wt。通过氢气（P_（H_2）= 0.1 atm）还原由三种化学方法形成的均匀分散的CuO和ZrO_2的均质混合物，可制得100％的氧化锆（3-YSZ）。在这些方法中，通过以下方式原位形成5％的ZrO_2 / Cu纳米复合材料：（1）在过滤后将NaOH溶液添加到一定量的分散的Cu（NO_3）_2，ZrOCl_2和Y（NO_3）_3醇溶液中; （2）在ZrOCl_2，Y（NO_3）_3溶液中加入氨水，然后在沉积物中加入Cu（NO_3）_2溶液。 （3）将Zr（OH）_4和Cu（NO_3）_2-3H_2O的混合物，在三种情况下混合并加热最终组合物以获得混合。并在500摄氏度下煅烧1小时。通过在真空气氛中在900摄氏度下淬火和最终烧结90分钟，可以制备5％的ZrO_2 / Cu复合材料。这三个过程分别称为过程A，过程B和过程C。复合样品的表征已通过XRD，SEM，TEM和金相技术完成。 XRD和TEM的结果表明，在这三个过程中形成了不同的晶体结构氧化锆。相比之下，方法B的复合微观结构更均匀。相对电导率和维氏硬度为64％IACS和120，远高于其他两个过程。

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