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首页> 外文会议>Researches in Powder Metallurgy >Analysis of Functional Properties of Cu-Al_2O_3 Particulate Reinforced Composites. A First Assessment: Elaboration
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Analysis of Functional Properties of Cu-Al_2O_3 Particulate Reinforced Composites. A First Assessment: Elaboration

机译：Cu-Al_2O_3颗粒增强复合材料的功能性能分析。初次评估：阐述

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The possibilities of Cu-Al_2O_3 particulate reinforced composites, of competitive functional properties, processing by the classical powder metallurgy route have been investigated taking into consideration its known technical and economical advantages in respect to the known worldwide investigated technological routes of their processing. The adopted compositions, of (5.0÷20.0) [vol.%] Al_2O_3, were selected in agreement with published data for a large range of applications. Pharmaceutical homogenization method applied for powder mixtures preparation proved to assure a high homogeneity, evidenced by SEM and EDS analyses. Their determined compressibility has shown that, for all compositions, the obtainable compactness is very close to that of pure Cu (even over 94 %). Cold uniaxial compaction at 500 and 700 MPa, and subsequent sintering in argon of high purity at 800 ℃ for 45 and 60 min have been adopted for composites realization. The performed analysis of the compacting pressure and sintering time influence on the composite compactness proved that, beside the above specified values obtaining for 700 MPa and 60 minute processing parameters, high enough values, acceptable for numerous applications, can be also obtained at 500 MPa and 60 or even 45 minutes. Finally, microstructural analysis highlighted that, by the adopted processing conditions, a high uniformity of Al_2O_3 particles distribution in the Cu matrix can been assured, both creating premises for obtaining good functional properties of Cu-Al_2O_3 composites, proving the competitiveness of the investigated PM route for their elaboration.
机译：已经研究了Cu-Al_2O_3颗粒增强复合材料具有竞争功能特性，通过经典粉末冶金路线进行加工的可能性，并考虑了其相对于世界范围内研究的已知技术路线所具有的已知技术和经济优势。选择与（5.0÷20.0）[vol。％] Al_2O_3的所采用的成分，以与已公布的数据相吻合，可用于多种应用。通过SEM和EDS分析证明，用于粉末混合物制备的药物均质化方法确保了较高的均质性。他们确定的可压缩性表明，对于所有组合物，可获得的紧密度都非常接近纯Cu（甚至超过94％）。在500和700 MPa下冷单轴压实，然后在800℃的高纯氩气中烧结45和60 min来实现复合材料。对压制压力和烧结时间对复合材料压实度的影响进行的分析证明，除了上述指定值（对于700 MPa和60分钟的加工参数获得的值）以外，在500 MPa和500 MPa的压力下也可以获得足够高的值，可以接受许多应用60甚至45分钟。最后，微观结构分析强调，通过采用的加工条件，可以确保Al_2O_3颗粒在Cu基体中的高度均匀分布，这都为获得良好的Cu-Al_2O_3复合材料的功能特性创造了前提，证明了所研究的PM路线的竞争力为他们精心制作。

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