Improvement of powder fabrication for additive manufacturing using ultrafine bubbles

IF 4.2 Q2 ENGINEERING, MANUFACTURING Additive manufacturing letters Pub Date : 2023-10-18 DOI:10.1016/j.addlet.2023.100181
Suxia Guo , Zhenxing Zhou , Mingqi Dong , Weiwei Zhou , Naoyuki Nomura
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Abstract

Freeze-dry pulsated orifice ejection method (FD-POEM) shows great potential in producing spherical refractory or multi-component alloy powders. However, addressing the dispersibility issue of high-concentration slurries is required to broaden the application scope of FD-POEM in additive manufacturing. To this end, this study proposes the use of ultrafine bubble (UFB) water as an economical additive to improve slurry dispersibility without introducing impurities. A refractory MoSiBTiC alloy with complex compositions was chosen as an example to demonstrate the effect of UFBs on the dispersibility of the slurry mixture and the morphology of the FD-POEM powders. The underlying mechanism of the improved slurry dispersibility was elucidated through calculations of repulsive forces. Consequently, the operational range for the FD-POEM process was significantly expanded from 10 to 20 % when using UFB water. In addition, the MoSiBTiC alloy build was fabricated via laser powder bed fusion (L-PBF) using FD-POEM-produced powders with UFB additives, exhibiting uniform dendrites and fine TiC nanoparticles distributed in the matrix. This study not only expands the potential applications of UFB water in powder fabrication but also paves the way for the processability of Mo-based parts with advanced microstructures by combining FD-POEM with L-PBF.

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超细气泡增材制造粉末工艺的改进
冻干脉冲孔喷射法(FD-POEM)在生产球形耐火或多组分合金粉末方面具有很大的潜力。但要拓宽FD-POEM在增材制造中的应用范围,需要解决高浓度浆料的分散性问题。为此,本研究提出使用超细气泡(UFB)水作为经济的添加剂,在不引入杂质的情况下提高浆料的分散性。以一种成分复杂的难熔MoSiBTiC合金为例,研究了UFBs对料浆混合物分散性和FD-POEM粉末形貌的影响。通过排斥力的计算,阐明了浆料分散性改善的潜在机理。因此,当使用UFB水时,FD-POEM工艺的操作范围从10%显著扩大到20%。此外,使用fd - poem生产的粉末和UFB添加剂通过激光粉末床熔合(L-PBF)制备了MoSiBTiC合金,在基体中表现出均匀的枝晶和细小的TiC纳米颗粒。本研究不仅拓展了UFB水在粉末制造中的潜在应用,而且通过FD-POEM与L-PBF的结合,为先进微结构mo基零件的可加工性铺平了道路。
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来源期刊
Additive manufacturing letters
Additive manufacturing letters Materials Science (General), Industrial and Manufacturing Engineering, Mechanics of Materials
CiteScore
3.70
自引率
0.00%
发文量
0
审稿时长
37 days
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