Selective laser sintering of amorphous metal powder

Fischer, Pascal; Blatter, A.; Romano, Valerio; Weber, H. P.

doi:10.1007/s00339-004-3062-7

Cited by 15 publications

(8 citation statements)

References 5 publications

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“…There fore, the process does not lead to a fully dense part. SLS was used in two studies for consolidation of MG powders, but it did not resul in a fully amorphous and dense parts [89,90].…”

Section: Selective Laser Sintering (Sls)mentioning

confidence: 99%

“…Later, BMGs based on other precious metals such as Pd [142], Pt [143], and Ag [144] were developed. There are three studies in the literature concerning AM of precious BMGs [73,89,90]. A Pt-based MG (Pt 57.3 Cu 14.7 Ni 5.3 P 22.7 ) powder was consolidated using pulsed SLS, and a partially crystallized structure was achieved [89,90].…”

Section: Based On Precious Metalsmentioning

confidence: 99%

“…There are three studies in the literature concerning AM of precious BMGs [73,89,90]. A Pt-based MG (Pt 57.3 Cu 14.7 Ni 5.3 P 22.7 ) powder was consolidated using pulsed SLS, and a partially crystallized structure was achieved [89,90]. Recently, using the LPBF method, a dense, amorphous, and crack-free Pd-based BMG (Pd 43 Cu 27 Ni 10 P 20 ) was fabricated [73], while exhibiting good mechanical and aesthetic properties.…”

Section: Based On Precious Metalsmentioning

confidence: 99%

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Additive Manufacturing of Bulk Metallic Glasses—Process, Challenges and Properties: A Review

Sohrabi

Jhabvala

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2021

Metals

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Bulk Metallic Glasses (BMG) are metallic alloys that have the ability to solidify in an amorphous state. BMGs show enhanced properties, for instance, high hardness, strength, and excellent corrosion and wear resistance. BMGs produced by conventional methods are limited in size due to the high cooling rates required to avoid crystallization and the associated detrimental mechanical properties. Additive manufacturing (AM) techniques are a potential solution to this problem as the interaction between the heat source, e.g., laser, and the feedstock, e.g., powder, is short and confined to a small volume. However, producing amorphous parts with AM techniques with mechanical properties comparable to as-cast samples remains a challenge for most BMGs, and a complete understanding of the crystallization mechanisms is missing. This review paper tries to cover recent progress in this field and develop a thorough understanding of the correlation between different aspects of the topic. The following subjects are addressed: (i) AM techniques used for the fabrication of BMGs, (ii) particular BMGs used in AM, (iii) specific challenges in AM of BMGs such as the control of defects and crystallization, (iv) process optimization of mechanical properties, and (v) future trends.

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Section: Selective Laser Sintering (Sls)mentioning

confidence: 99%

Section: Based On Precious Metalsmentioning

confidence: 99%

Section: Based On Precious Metalsmentioning

confidence: 99%

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Additive Manufacturing of Bulk Metallic Glasses—Process, Challenges and Properties: A Review

Sohrabi

Jhabvala

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2021

Metals

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“…Consolidation of amorphous PtCUNiP powder through selective laser sintering requires much less average power and pulse energy, The reason is that an amorphous material already is in a thermodynamic liquid state and therefore does not require any heat of transition for melting. A comprehensive discussion of the much lower laser energy required for the sintering of amorphous PtCuNiP powder in comparison to the sintering of Titanium can be found in [5].…”

Section: Cp Titaniummentioning

confidence: 99%

<title>High precision pulsed selective laser sintering of metallic powders</title>

et al. 2005

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The generative process of selective laser sintering of powders such as Titanium, Platinum alloys and steel can in comparison to cw radiation significantly be improved by using pulsed radiation. With an appropriate energy deposition in the metallic powder layer, the material properties of the selective laser sintered parts can locally be tailored to the requirements of the finished work piece. By adapting the laser parameters of a Q-switched Nd:YAG laser, notably pulse duration and local intensity, the degree of porosity, density and even the crystalline microstructure can be controlled. Pulsed interaction allows minimizing the average power needed for consolidation of the metallic powder, and leads to less residual thermal stresses. With laser post processing, the surface can achieve bulk-like density. Furthermore, we present the possibility of forming metallic glass components by sintering amorphous metallic powders.

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“…Among SFF techniques, the most promising methods for the production of metal components are the ones that make components by bonding metal powders: laser sintering and 3D printing are the candidates in this category. Selective laser sintering (SLS) [1][2][3][4][5] has been widely studied in the application to metal and alloy powders. In this process, a CO 2 or Nd:YAG laser is usually used as a heat source and selectively scans a powder bed of the powder spread on a flat stage, to join the powder in the designed shape of the cross section.…”

Section: Introductionmentioning

confidence: 99%

Dense P/M Component Produced by Solid Freeform Fabrication (SFF)

et al. 2005

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Using fine metal powders, we were able to fabricate dense P/M (powder metallurgy) products by a three-dimensional inkjet printing system. We used carbonyl nickel powder with a mean particle size of 5 mm as a raw material and examined two binder supply methods: (i) supplying a binder directly from the inkjet head (DB method), and (ii) coating the powder with a water-soluble polymer and then supplying thin polymer-dissolved water from the inkjet head (CB method). The layered green product was sintered in a hydrogen atmosphere at a temperature in the range of 1073-1623 K. Sintered samples fabricated by the CB method had non-uniform microstructure due to agglomeration of the coated powder. In samples made by the DB method, the macroscopic shape was retained after high-temperature sintering at 1623 K, and a high density of over 90% was achieved, which was attributed to uniform powder cohesion in the laminating process.

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Selective laser sintering of amorphous metal powder

Cited by 15 publications

References 5 publications

Additive Manufacturing of Bulk Metallic Glasses—Process, Challenges and Properties: A Review

Additive Manufacturing of Bulk Metallic Glasses—Process, Challenges and Properties: A Review

<title>High precision pulsed selective laser sintering of metallic powders</title>

Dense P/M Component Produced by Solid Freeform Fabrication (SFF)

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