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利用热膨胀仪(DIL)、显微硬度计、电化学工作站、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)研究了Au_(52)Cu_(27)Ag_(17-x)(NiZn_(0.5))_x (x=0,6,12)合金的热膨胀行为、显微硬度和电化学耐腐蚀性。随着x的增加,在热膨胀实验测试中合金的相对长度膨胀量和DIL曲线极大值的温度T_(lm)(即热稳定性)增加,这可以归因于原子结合能、错配熵的变化以及相变。增加x,合金的显微硬度可以得到提高,但是耐腐蚀性下降;此外,极化曲线的阳极电流峰密度随着x的增加而下降,这些结果与固溶度以及Ag、Ni、Zn合金元素在含Cl-离子溶液中的溶解密切相关。
The effects of Au_ (2) and Au_ (2) were investigated by means of dilatometer, microhardness tester, electrochemical workstation, XRD, SEM, TEM and XPS. 52) thermal expansion behavior, microhardness and electrochemical corrosion resistance of Cu 27 Ag 17-x NiZn 0.5 0.5 _ x (x = 0,6,12) alloys. With the increase of x, the relative length expansion of the alloy and the temperature T lm (ie, thermal stability) of the maximum value of the DIL curve in the thermal expansion experiment test increase, which can be attributed to the atomic binding energy, mismatch entropy Change and phase change. When x is added, the microhardness of the alloy can be improved, but the corrosion resistance decreases. In addition, the peak current density of the polarization curve decreases with the increase of x. These results are in agreement with the solubility of solid solution, Dissolution in Cl- containing ions is closely related.