Zongwen Fu

Friedrich-Alexander-Universität Erlangen-Nürnberg

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Carolin Körner

Friedrich-Alexander-Universität Erlangen-Nürnberg

Nahum Travitzky

Friedrich-Alexander-Universität Erlangen-Nürnberg

Peter Greil

Friedrich-Alexander-Universität Erlangen-Nürnberg

Andreas Roosen

Friedrich-Alexander-Universität Erlangen-Nürnberg

Jihui Ye

Friedrich-Alexander-Universität Erlangen-Nürnberg

Torsten Kraft

Fraunhofer Institute for Mechanics of Materials

Jing Yang

Friedrich-Alexander-Universität Erlangen-Nürnberg

Tobias Fey

Friedrich-Alexander-Universität Erlangen-Nürnberg

Freddy Leijon

Norsk Hydro (Sweden)

Pit Polfer

Fraunhofer Institute for Mechanics of Materials

Cooperative Institutions

Friedrich-Alexander-Universität Erlangen-Nürnberg

Zhejiang University

Universität Hamburg

Institute of Automation

Institute of New Materials

National Research Tomsk State University

Tomsk Polytechnic University

Materials Science & Engineering

Linköping University

Chinese Academy of Sciences

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New Class of Plastic Bulk Metallic Glass

Physical Review Letters (2008)

Lianyi Chen Zongwen Fu G. Q. Zhang Xiuhong Hao Q.K. Jiang

An intrinsic plastic ${\mathrm{Cu}}_{45}{\mathrm{Zr}}_{46}{\mathrm{Al}}_{7}{\mathrm{Ti}}_{2}$ bulk metallic glass (BMG) with high strength and superior compressive plastic strain of up to 32.5% was successfully fabricated by copper mold casting. The superior compressive plastic strain was attributed to a large amount of randomly distributed free volume induced by Ti minor alloying, which results in extensive shear band formation, branching, interaction and self-healing of minor cracks. The mechanism of plasticity presented here suggests that the creation of a large amount of free volume in BMGs by minor alloying or other methods might be a promising new way to enhance the plasticity of BMGs.

Shear band

10.1103/physrevlett.100.075501

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Citations (211)

Effect of pore orientation on anisotropic shrinkage in tape-cast products

Journal of the European Ceramic Society (2014)

Zongwen Fu Armin Dellert Marita Lenhart Andreas Roosen

Shrinkage

Green body

Tape casting

Particle (ecology)

10.1016/j.jeurceramsoc.2014.03.002

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Citations (16)

Electron beam-based additive manufacturing of Fe93.5Si6.5 (wt.%) soft magnetic material with controllable magnetic performance

Scripta Materialia (2021)

Jing Yang Zongwen Fu Jihui Ye Daniel Kübrich Carolin Körner

Saturation (graph theory)

Electrical steel

10.1016/j.scriptamat.2021.114460

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Citations (20)

Laser‐Associated Selective Metallization of Ceramic Surface with Infrared Nanosecond Laser Technology

Advanced Engineering Materials (2019)

Li Wang Zongwen Fu Robert Suess‐Wolf Nahum Travitzky Peter Greil

A new approach for the metallization of ceramic substrate by Infrared Nanosecond Laser Technology (INLT) is developed in the present work. The activation of ceramic surface by INLT with a wavelength of 1064 nm promotes the chemical electroless copper plating. The laser associated modification of ceramics in terms of laser ablation is also determined. The ablation threshold for the Al 2 O 3 ‐Cu 2 O ceramic used in this study is identified at 3.82 and 1.86 J cm −2 with respect to single pulse irradiation and multiple pulses irradiation, respectively. The thickness of plated copper layer on the activated ceramic surface is strongly dependent on the laser fluence and can reach the maximum thickness at the fluence nearby the ablation threshold.

Laser Ablation

Nanosecond

Surface Modification

10.1002/adem.201900096

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Citations (13)

Shrinkage of Tape Cast Products During Binder Burnout

Journal of the American Ceramic Society (2014)

Zongwen Fu Andreas Roosen

During sintering of tape cast products, anisotropic shrinkage occurs, which can be attributed to an anisotropic green tape structure concerning particle and pore orientation. Little is known about the shrinkage during binder burnout ( BBO ) and its relation to the microstructure of green tapes including the binder–plasticizer phase. Therefore, the article determines the shrinkage behavior of green tapes derived from alumina powders with different particle shape during binder burnout and prefiring in all spatial directions. The shrinkage after prefiring relative to the green and the debindered states is also discussed. The interrelation between shrinkage behavior and microstructure is investigated in dependence on different process parameters and specifically on the thermal behavior of the binder–plasticizer phase in the green tapes. It is shown that the subtraction of the BBO shrinkage from the total shrinkage results in completely different data for the sintering shrinkage anisotropy in z direction.

Shrinkage

Green body

Particle (ecology)

10.1111/jace.13270

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Citations (28)

Crack healing of ferrosilicochromium-filled polymer-derived ceramic composites

Journal of the European Ceramic Society (2018)

Lorenz Schlier Zongwen Fu Joe Harris Peter Greil Nahum Travitzky

Pyrolytic carbon

Ceramic matrix composite

10.1016/j.jeurceramsoc.2018.01.015

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Citations (5)

Advanced process strategy to realize microducts free of powder using selective electron beam melting

The International Journal of Advanced Manufacturing Technology (2019)

Christoph R. Pobel Sabrina Reichel Zongwen Fu Fuad Osmanlic Carolin Körner

Flatness (cosmology)

10.1007/s00170-019-03615-3

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Citations (7)

Novel Hybrid Printing of Porous TiC/Ti6Al4V Composites

Advanced Engineering Materials (2019)

Pinku Yadav Thomas Böck Zongwen Fu Hannes Lorenz I. Gotman

Porous TiC/Ti6Al4V composite samples are fabricated by novel hybrid 3D‐printing (3DP)/sintering method using a blend of Ti6Al4V and dextrin powders as a precursor material. TiC/Ti6Al4V samples are 3D‐printed with two different layer thicknesses of 0.150 and 0.175 mm, and subsequently sintered at various sintering temperatures and dwell times. X‐ray analysis of the fabricated composites shows the presence of Ti and TiC. The maximum Young's modulus of porous TiC/Ti6Al4V samples is found to be ≈51 GPa. An overall porosity of the sintered samples ranges from 12% to 35% with a pore size of 65–160 μm. The bending strength ranges from ≈80 to ≈285 MPa depending on the sintering parameters. The compressive strength and hardness of the obtained composites are also reported. Binder jetting 3DP process overcomes the problem of fabricating complex structures and has an edge over conventional techniques such as casting, machining, etc. Several complex‐shaped models are fabricated to demonstrate the net‐shape capability of this approach.

Titanium alloy

10.1002/adem.201900336

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Citations (12)

Functional Properties and Shape Memory Effect of Nitinol Manufactured Via Electron Beam Powder Bed Fusion

Alexander Fink Zongwen Fu Carolin Körner

Ti-rich Nitinol (NiTi) is characterized by its functional properties to restore its original shape after deformation due to a temperature-induced reversible martensitic phase transition. In this study, dense Ti-rich Nitinol free of cracks is successfully produced by means of Electron Beam Powder Bed Fusion (PBF-EB). The martensitic phase transition behavior of the as-built NiTi parts and powder is analyzed using Differential Scanning Calorimetry (DSC) analysis. To gain a deep understanding of the DSC results, segregation during solidification is thermodynamically studied (CALPHAD). The PBF-EB-fabricated NiTi shows a microstructure containing fine columnar grains and numerous precipitates, whose influence on the tensile properties at room temperature is discussed. Furthermore, the one-way and two-way shape memory effects of PBE-EB-produced NiTi are investigated using an innovative experimental setup based on thermomechanical training.

10.2139/ssrn.4407515

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Citations (0)

Reactive Synthesis of Ceramic‐Metal Composites

Advanced Engineering Materials (2018)

Nahum Travitzky Zongwen Fu A. G. Knyazeva Rolf Janßen Dmitri Nekludov

Since the last century, a variety of reactive synthesis methods has been extensively studied and developed to derive ceramic composite materials, which show superior mechanical and physical properties for numerous applications. Melt casting/infiltration is one of the preferred techniques to fabricate ceramic‐metal composites. In this article, different reactive processing routes and the properties of the synthesized ceramic‐metal composites are reviewed. The reaction forming techniques regarding raw material properties and processing parameters are discussed.

Reactive material

Ceramic composite

Materials processing

Characterization

10.1002/adem.201800324

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Citations (13)