使用纳米二氧化硅增强尼龙12选择性激光烧结(SLS)成形件,通过溶剂沉淀法制备SLS用纳米二氧化硅/尼龙12复合粉末材料,研究了纳米二氧化硅对SLS成形件力学性能的影响,结果表明:纳米二氧化硅以纳米尺寸均匀分散在尼龙12基体中:复合粉末的粒径比纯尼龙12的粉末小,因而有利于提高烧结速率及成形件精度;复合粉末比尼龙12的粉末具有更高的热稳定性;复合粉末烧结件的拉伸强度、拉伸模量以及冲击强度比纯尼龙12烧结件分别提高了约20.9%、39.4%和9.5%,说明纳米二氧化硅对尼龙12 SLS成形件的增强效果显著.
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