ABSTRACT In this study, technological hybridization of three-dimensional printing technology and ultrasonic-assisted pressure-less sintering has been used for fabricating electrically conductive copper specimens. The influence of sintering and ultrasonic vibration parameters was studied on the electrical conductivity measurements. A step-shape long ultrasonic horn was designed to amplify the vibrations. The cavity for powder pouring was formed in the steel crucible, and further, the crucible was attached to the ultrasonic horn. The horn along with crucible was placed inside the conventional tube and sintering was performed at different cycles. A central composite design was used to plan the experiments for processing parameters, including sintering temperature, heating rate, soaking time, and ultrasonic power percentage intensity (UPPI). The eddy current method-based apparatus has been employed for measuring the electrical conductivity of samples. Analysis of variance has been used to obtain the significant factors to understand the processing characteristics. Sintering temperature and UPPI have been obtained as the most dominating parameters effecting electrical conductivity of the sintered samples. Further, the different interactions have been studied for the electrical conductivity value. The statistical model was optimized to get parameters for maximum electrical conductivity. The results of the present study were validated with Wiedemann–Franz law.

中文翻译：

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参数对快速制造铜电导率的影响

摘要 在这项研究中，三维打印技术和超声波辅助无压烧结的技术混合已被用于制造导电铜样品。研究了烧结和超声振动参数对电导率测量的影响。设计了一个阶梯形长超声波喇叭来放大振动。在钢制坩埚中形成浇粉腔，然后将坩埚安装在超声波变幅杆上。将喇叭和坩埚放在传统管内，并以不同的周期进行烧结。中央复合设计用于规划加工参数的实验，包括烧结温度、加热速率、均热时间和超声功率百分比强度 (UPPI)。基于涡流法的装置已被用于测量样品的电导率。方差分析已被用于获得重要因素以了解加工特性。已获得烧结温度和 UPPI 作为影响烧结样品电导率的最主要参数。此外，已经研究了电导率值的不同相互作用。优化统计模型以获得最大电导率的参数。本研究的结果得到了 Wiedemann-Franz 定律的验证。已获得烧结温度和 UPPI 作为影响烧结样品电导率的最主要参数。此外，已经研究了电导率值的不同相互作用。优化统计模型以获得最大电导率的参数。本研究的结果得到了 Wiedemann-Franz 定律的验证。已获得烧结温度和 UPPI 作为影响烧结样品电导率的最主要参数。此外，已经研究了电导率值的不同相互作用。优化统计模型以获得最大电导率的参数。本研究的结果得到了 Wiedemann-Franz 定律的验证。