以Cu_2O和炭黑粉末为原料,采用原位还原-无压(热压)烧结工艺制备Cu_2O-Cu复合材料.利用XRD和OM对烧结试样进行研究,并测试其力学性能.研究表明,复合材料由Cu和Cu_2O两相组成,原位还原-无压烧结法的合理烧结时间为5 h,其力学性能高于传统粉末冶金法制备复合材料力学性能,抗压强度464 MPa.原位还原-热压烧结法可以改善试样致密性及细化微观组织,进一步提高力学性能,抗压强度达到702 MPa.
Cu-Cu_2O composites were prepared from C and Cu_2O powders, called as in-situ reduction-pressure less sintering (IRPS) method and in-situ reduction-hot pressing (IRHP) method. Samples were characterized by X-ray diffraction and optical microscope. XRD analysis shows that the samples only consist of Cu_2O and Cu phases. The microstructure analysis shows that the optimum sintering time for the IRPS method is 5 h at 1050 ℃, and the IRHP method leads to lower porosity and smaller Cu_2O matrix crystal sizes. The compressive strength of the sample prepared by IRPS method is higher than thoseprepared by conventional powder metallurgic method (PMM). The compressive strength of the sample prepared by IRHP method is higher than those prepared by IRPS method.
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