论文标题
节能火花等离子体烧结：打破大尺寸工具的阈值
Energy efficient spark plasma sintering: Breaking the threshold of large dimension tooling energy consumption
论文作者
论文摘要
开发了一种能够由非常低的电流水平辅助的大尺寸样品致密化的能源有效的火花等离子体烧结方法。在这种方法中，电流集中在样品周围的石墨箔中。然后在该区域实现高能量耗散，从而使大型（氧化铝）部分（{Ø} 40毫米）在相对较低的电流（800 A）中的加热和完全致密。电热机械模拟表明，与传统配置相比，节能配置所需的电流要低70％。对于较大尺寸的样品，还揭示了热和致密梯度的存在。讨论了有关此问题的潜在解决方案。该实验证实了大型氧化铝样品完全致密（96-99％）的可能性。这种方法允许使用小型样品（40-50毫米）的小型（和低成本）SPS设备（通常限制为10-15毫米样品）。开发的技术还可以通过大型SPS系统进行优化的能源消耗。
An energy efficient spark plasma sintering method enabling the densification of large size samples assisted by very low electric current levels is developed. In this method, the electric current is concentrated in the graphite foils around the sample. High energy dissipation is then achieved in this area enabling the heating and full densification of large (alumina) parts ({Ø} 40 mm) at relatively low currents (800 A). The electrothermal mechanical simulation reveals that the electric current needed to heat the large samples is 70 % lower in the energy efficient configuration compared to the traditional configuration. The presence of thermal and densification gradients is also revealed for the larger size samples. Potential solutions for this problem are discussed. The experiments confirm the possibility of full densification (96-99 %) of large alumina samples. This approach allows using small (and low cost) SPS devices (generally limited to 10-15 mm samples) for large size samples (40-50 mm). The developed technique enables also an optimized energy consumption by large scale SPS systems.
