Abstract Microwave sintering has been a well-established technique to consolidate metal powders due to its instantaneous volumetric and rapid heating as compared to conventional heating. Al-3.8Cu-1Mg-0.8Si-0.3Sn (2712) alloy powders were compacted (200 and 400 MPa) and microwave sintered at different temperatures (570 to 630 °C) under different atmospheres (vacuum, N2, Ar and H2). Increasing sintering temperature enhanced sintered density from 91% to 98%. Sintering under vacuum at 590°C was more efficient with a densification parameter of 0.36 followed by N2, Ar and H2. Regardless of the sintering condition, phase analysis via XRD revealed the presence of only a-Al peak attributed to lesser time available for diffusion of alloying elements. In addition, microstructural inhomogeneity leading to more intergranular melt formation was observed for all sintered compacts. Contrasting to densification, sintering in N2 resulted in better corrosion resistance.

中文翻译：

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Al-Cu-Mg-Si-Sn合金的微波辅助烧结

摘要 与传统加热相比，微波烧结因其瞬时体积和快速加热而成为一种成熟的金属粉末固结技术。Al-3.8Cu-1Mg-0.8Si-0.3Sn（2712）合金粉末在不同气氛（真空、N2、Ar和H2）下在不同温度（570至630°C）下压实（200和400 MPa）和微波烧结. 提高烧结温度可将烧结密度从 91% 提高到 98%。在 590°C 真空下烧结效率更高，密度参数为 0.36，然后是 N2、Ar 和 H2。无论烧结条件如何，通过 XRD 的相分析表明仅存在 a-Al 峰，这是由于合金元素扩散的可用时间较短。此外，对于所有烧结压块，观察到导致更多晶间熔体形成的微观结构不均匀性。与致密化相反，在 N2 中烧结导致更好的耐腐蚀性。