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首页> 外文期刊>Journal of Manufacturing Processes >Experimental investigation of phase change materials fabricated using selective laser sintering additive manufacturing
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Experimental investigation of phase change materials fabricated using selective laser sintering additive manufacturing

机译：使用选择性激光烧结添加剂制造制造的相变材料的实验研究

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The increased demand for phase-change-materials-enabled energy storage systems exposed the limitations of established manufacturing methods in terms of material properties, fabrication speed, material waste, and shape-form flexibility. Phase change materials have unique merits in latent heat thermal energy storage, due to its capability of providing high-energy density storage by solidifying/melting at a constant temperature. In this research, a phase change composite was developed by mixing paraffin wax with a thermal conductive expanded graphite. Using a layer-by-layer laser sintering method, these two materials were combined at a micro-scale, forming a phase change composite that possesses good thermal conductivity, superior latent heat, and good mechanical strength. This work investigated the key parameters for successful production of paraffin wax/expanded graphite composite using laser sintering technique. In particular, the paraffin wax is melted and then impregnated into the inter-particle pores of expanded graphite through capillaries. It serves as a binder that bonds the expanded graphite molecules together into a solid form-stable object during the laser sintering process. To validate the developed sintering process, samples with a various number of layers were fabricated and tested. Results showed good structural integrity and functionality of the printed samples. The thermal conductivity was in the range of 0.83-0.92 W m(-1) K-1. The latent heat was in the range of 150-156 kJ kg(-1). Modulus of elasticity was between 808-880 MPa while the tensile strength in the range of 2.2-3.3 MPa. The electrical resistivity ranged between 8 and 28 Ohm m. These experimental results verified that the developed laser sintering process could be used as an effective nontraditional manufacturing technique for fabricating phase change materials for thermal energy storage applications.
机译：支持相变材料的能量存储系统的需求增加暴露了在材料性质，制造速度，材料废物和形状形状的柔性方面的建立制造方法的局限性。相变材料具有潜热热能存储的独特优点，由于其通过在恒定温度下通过固化/熔化提供高能密度储存的能力。在该研究中，通过将石蜡蜡与导热膨胀的石墨混合来开发相变复合物。使用逐层激光烧结方法，将这两种材料以微级组合，形成相变复合材料，其具有良好的导热性，潜热和良好的机械强度。该工作研究了使用激光烧结技术成功生产石蜡/膨胀石墨复合材料的关键参数。特别地，石蜡熔融熔化，然后通过毛细管浸渍到膨胀的石墨的颗粒孔中。它用作粘合剂，其在激光烧结过程中将膨胀的石墨分子粘合到固体形状稳定的物体中。为了验证开发的烧结过程，制造和测试了具有各种层的样品。结果表明印刷样品的结构完整性和功能良好。导热率在0.83-0.92wm（-1）k-1的范围内。潜热在150-156 kJ kg（-1）的范围内。弹性模量在808-880MPa之间，而拉伸强度在2.2-3.3MPa的范围内。电阻率范围为8至28欧姆m。这些实验结果证实了开发的激光烧结过程可用作用于制造用于热能储存应用的相变材料的有效的非传统制造技术。

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