Binder jet additive manufacturing (BJAM) enables processing of metals, ceramics, polymers and composites through the deposition of a binding agent onto a powder bed in a layer-by-layer sequence. Most commonly, a polymer binder is utilized to provide temporary strength to the printed component enabling part removal and handling from the printer; however, it is challenging to manage distortion and shrinkage during sintering. Reactive binders, which create solid interparticle bridges upon decomposition, provide additional benefit beyond temporary green strength and can lead to enhanced densification kinetics, control of warping and shrinkage, and tailoring of local composition. This paper presents a process for the development of custom binder inks which includes exploration of binder ink rheology, wetting and infiltration interactions between the binder ink and powder, ink jetting and the effect of drop spacing on line formation, thermal decomposition of the binder, and evaluation of green strength using indentation. The binder ink development process is applied to the synthesis of custom polymer and reactive (metal salt) binder inks, showcasing the capability to control jetting behavior through rheological modifications and the favorable comparability of wetting, infiltration, and green strength of the reactive binders to the studied polymer binders. The viscosity and surface tension of the binder inks vary by 10 cP and 35 mN/m, respectively, with successful jetting and powder binding achieved by polymer and metal salt binder inks, with green strengths measured between 2 and 18 MPa. Through our presented process, rapid sampling of binders can be performed and through the implementation of reactive binders into BJAM in the future, a powerful tool for control of densification and warping is identified.

粘合剂喷射增材制造 (BJAM) 可以通过将粘合剂逐层沉积到粉末床上来加工金属、陶瓷、聚合物和复合材料。最常见的是，使用聚合物粘合剂为打印组件提供临时强度，从而能够从打印机中移除和处理部件；然而，在烧结过程中控制变形和收缩是具有挑战性的。反应性粘合剂在分解时产生固体颗粒间桥，除了临时生坯强度外，还提供额外的好处，并可以提高致密化动力学、控制翘曲和收缩以及调整局部成分。本文介绍了定制粘合剂墨水的开发过程，其中包括对粘合剂墨水流变学的探索、粘合剂墨水和粉末之间的润湿和渗透相互作用、喷墨和墨滴间距对线条形成的影响、粘合剂的热分解以及使用压痕评估生坯强度。粘合剂墨水开发过程应用于定制聚合物和反应性（金属盐）粘合剂墨水的合成，展示了通过流变改性控制喷射行为的能力，以及反应性粘合剂的润湿、渗透和生胶强度的良好可比性。研究了聚合物粘合剂。粘合剂墨水的粘度和表面张力分别为 10 cP 和 35 mN/m，聚合物和金属盐粘合剂墨水成功实现了喷射和粉末粘合，生胶强度在 2 到 18 MPa 之间测量。通过我们介绍的流程，