Direct metal deposition of TiB 2 /AlSi10Mg composites using satellited powders

Tan, Hua; Hao, Dapeng; Al-Hamdani, Kamaal S.; Zhang, Fengying; Xu, Zhaowen; Clare, Adam T.

doi:10.1016/j.matlet.2017.11.121

Cited by 50 publications

(13 citation statements)

References 11 publications

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“…Obviously, the feature of pore defects inside the parts deteriorate with the decreasing of scanning speed during depositing. This result is consistent with the research and speculation of Tan [17], and this phenomenon also exist in the cladding process of other materials [18]. Fig.…”

Section: Methodssupporting

confidence: 92%

Effect of processing parameters on solidification defects behavior of laser deposited AlSi10Mg alloy

Gao

Zhao

et al. 2019

Vacuum

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Section: Methodssupporting

confidence: 92%

Effect of processing parameters on solidification defects behavior of laser deposited AlSi10Mg alloy

Gao

Zhao

et al. 2019

Vacuum

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“…A recent study by Bolelli et al (Ref 21) produced NiCrAlY-Al 2 O 3 composite coatings by a ''hybrid'' spraying technique with two injection nozzles feeding both dry NiCrAlY powder and a suspension of Al 2 O 3 particles simultaneously into the gas stream. More recently, satelliting, as a manufacturing technique (Ref [22][23][24][25], was introduced to mix small quantities of hard reinforcing submicron or nanoparticles into larger volumes of soft metallic matrix powders. The ''satellited'' powders were obtained by mixing the two powders in a water solution containing 2.7 wt.% of polyvinyl alcohol (PVA) as a binder, followed by a drying process.…”

Section: Introductionmentioning

confidence: 99%

“…The ''satellited'' powders were obtained by mixing the two powders in a water solution containing 2.7 wt.% of polyvinyl alcohol (PVA) as a binder, followed by a drying process. This satelliting process has been patented ( Ref 22), and it is now used for a wide range of composite manufacturing applications that involves powder feedstock, e.g., additive manufacturing and cold spraying (Ref [23][24][25][26]. In this study, a similar powder mixing process via a suspension route was introduced with the aim to achieve a uniform distribution of Al 2 O 3 submicron particles with MCrAlY powders, albeit without any binders.…”

Section: Introductionmentioning

confidence: 99%

Preparation of MCrAlY–Al2O3 Composite Coatings with Enhanced Oxidation Resistance through a Novel Powder Manufacturing Process

et al. 2019

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MCrAlY-Al 2 O 3 composite coatings were prepared by high-velocity oxygen fuel thermal spraying with bespoke composite powder feedstock for high-temperature applications. Powder processing via a suspension route was employed to achieve a fine dispersion of a-Al 2 O 3 submicron particles on the MCrAlY powder surface. This was, however, compromised by * 50% less flowability of the feedstock during spraying. Nevertheless, the novel powder manufacturing process introduced in this study has shown potential as an alternative route to prepare tailored composite powder feedstock for the production of metal matrix composites. In addition, the newly developed MCrAlY-Al 2 O 3 composite coatings exhibited superior oxidation resistance, compared to conventional MCrAlY coatings, with the formation of nearly exclusively Al 2 O 3 scale after isothermal oxidation at 900°C for 10 h. The addition of a-Al 2 O 3 particles in the MCrAlY coatings as a second phase was found to have promoted the formation of YAG oxides (Y x Al y O z) during spraying and also accelerated the outwards diffusion of Al, which resulted in enhanced oxidation resistance.

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“…Since the feedstock of MMCs is not commercially available for AM processing [29], several techniques have been employed in recent years to prepare these powders. The mechanical routes such as regular mixing [30,31,32] and ball milling [33,34,35,36,37,38,39], and non-mechanical methods including gas atomization of a pre-alloyed system [40,41], agent-assisted deposition [42,43] and electrodeposition [44,45] are among these methods. Compared to the mechanical mixing routes, which have attracted a great deal of attention in recent years, the non-mechanical methods have been rarely adopted to prepare composite powder feedstocks for AM purposes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Composite Powder Feedstock from Powder Bed Fusion Additive Manufacturing Perspective

2019

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This research aims at evaluating the characteristics of the 5 wt.% B4C/Ti-6Al-4V composite powder feedstock prepared by two different categories of mechanical mixing for powder bed fusion (PBF) additive manufacturing (AM) of metal matrix composites (MMCs). Microstructural features, particle size, size distribution, sphericity, conditioned bulk density and flow behavior of the developed powders were examined. The flowability of the regularly mixed powders was significantly lower than that of the Ti-6Al-4V powder. However, the flowability of the ball-milled systems was a significant function of the milling time. The decrease in the flowability of the 2 h ball-milled powder compared to the Ti-6Al-4V powder was attributed to the mechanical interlocking and the entangling caused by the B4C particles fully decorating the Ti-6Al-4V particles. Although the flattened/irregular shape of powder particles in the 6 h milled system acted to reduce the flowability, the overall surface area reduction led to higher flowability than that for the 2 h milling case. Regardless of the mixing method, incorporation of B4C particles into the system decreased the apparent density of the Ti-6Al-4V powder. The composite powder obtained by 2 h of ball milling was suggested as the best possible condition, meeting the requirements of PBF–AM processes.

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Direct metal deposition of TiB 2 /AlSi10Mg composites using satellited powders

Cited by 50 publications

References 11 publications

Effect of processing parameters on solidification defects behavior of laser deposited AlSi10Mg alloy

Effect of processing parameters on solidification defects behavior of laser deposited AlSi10Mg alloy

Preparation of MCrAlY–Al2O3 Composite Coatings with Enhanced Oxidation Resistance through a Novel Powder Manufacturing Process

Characterization of Composite Powder Feedstock from Powder Bed Fusion Additive Manufacturing Perspective

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