Article
Engineering, Chemical
Moritz Ruether, S. Helge Klippstein, SathishKumar Ponusamy, Torben Ruether, Hans-Joachim Schmid
Summary: By analyzing the polymer powders at different temperatures, the flowability and spreadability of the powders for selective laser sintering were investigated. The Revolution Powder Analyzer and the modified Schulze Ring Shear Tester were used for the measurements. Results of both tests showed that the powders' flowability decreases with increasing temperature, especially near the materials' melting point. Recoating tests on an EOS P395 machine revealed that the number and severity of defects increase with temperature, but they greatly decrease when approaching the sintering window, resulting in a stronger and more defect-resistant powder bed.
Article
Nanoscience & Nanotechnology
Jiahua Zhu, Yuanfei Cai, Yan Zhang, Xiaodi Liu, Jinseng Tian, Jiang Ma, Jun Shen
Summary: The FeSiB-rich particle-reinforced Cu metal matrix composites were successfully fabricated using the spark plasma sintering technique. The composites showed significantly enhanced strength without sacrificing ductility, which was mainly attributed to the homogeneously distributed reinforcements and high interfacial strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Marco Pelanconi, Paolo Colombo, Alberto Ortona
Summary: The study introduces a novel hybrid additive manufacturing technique that combines selective laser sintering (SLS) of polyamide powders with preceramic polymer infiltration and pyrolysis to create Silicon Carbide components. The mechanical strength of the resulting ceramic increased up to 24 MPa with more reinfiltration cycles, while the residual porosity decreased to 10%. The microstructure exhibited phases of SiOC and SiC, with SiC derived from the pyrolysis of the preceramic precursor.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Chemical
Shashank Vummidi Lakshman, John D. Gibbins, Timothy P. Weihs
Summary: This study investigates the impact of milling duration on the size, microstructure, and properties of different Al-Mg-Zr composite powders, revealing that refinement of Zr inclusions and reduction in average size can lead to lower ignition temperatures.
Article
Food Science & Technology
Denise Felix da Silva, Luca Bettera, Richard Ipsen, Anni Bygvraa Hougaard
Summary: This study compared the emulsification properties of cheese powder and egg yolk powder in mayonnaise, and found that mayonnaise made using Cheddar cheese powder showed the highest similarity to egg yolk powder in terms of rheological properties and stiffness. On the other hand, samples with Camembert cheese powder showed lower consistency index and stiffness.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Mohammad Uddin, Daniel Williams, Anton Blencowe
Summary: This study demonstrates the feasibility of recycling waste SLS nylon into printable filaments and parts reinforced with Mg particles. The recycled materials showed enhanced mechanical properties and were able to produce parts with desired geometric shapes and acceptable surface texture.
Review
Metallurgy & Metallurgical Engineering
Abhijeet Premkumar Moon, Srinivas Dwarapudi, Kameswara Srikar Sista, Deepak Kumar, Gourav Ranjan Sinha
Summary: Metal Injection Molding (MIM) offers advantages such as design flexibility, mass customization, waste reduction, and the ability to manufacture complex-shape structures. The groundbreaking applications of MIM in automotive, medical, and magnetic materials were discussed, along with the current status of iron powder product development for MIM. Challenges in processing for high-end applications using MIM technology were also explored in the paper.
ISIJ INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Farheen F. Ahmed, Samuel J. Clark, Chu Lun Alex Leung, Leigh Stanger, Jon Willmott, Sebastian Marussi, Veijo Honkimaki, Noel Haynes, Hatem S. Zurob, P. D. Lee, A. B. Phillion
Summary: This study investigates the in-situ alloying and microstructure evolution during Selective Laser Melting with Blended Elemental powders. It is found that full alloying and consistent microstructures require further thermal cycling in the heat-affected zone.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Guoqiang Luo, Jingwei Guo, Jianian Hu, Peibo Li, Yi Sun, Qiang Shen
Summary: In this study, W-Ag matrix composites were fabricated using Cu and Ag coated W powders. The Cu-Ag coating promoted the sintering process, improved the densification, and enhanced the interfacial bonding. The composites exhibited increased hardness, compressive strength, and electrical conductivity.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Ceramics
Decai Lu, Liwei Zhang, Su Cheng, Dequan Shi, Kun Zhang, Wencheng Shao, Duomu Lin, Tao Zeng
Summary: SiCw/SiC materials were prepared using SLS technology, and the effect of SiC powder size on whisker formation was investigated. A relationship model between the growth rate of SiC whisker and porosity was established, revealing the influence mechanism of powder size on the number of whisker growth. The calculated results using this model agreed with the test results, making it suitable for microstructure control of in-situ whiskers under SLS technology.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Le Lin, Bolu Liu, Taiquan Zhang, Benfu Long, Liangliang Lin, Chaoying Fan, Xiao Wen, Chao Liu
Summary: This article investigates the microstructural evolution, phase transition mechanisms, and grain growth process of coarse particle size tungsten carbide (WC) powder. The results reveal that the phase transition process is controlled by carbon diffusion reaction, and the grain growth follows the recrystallization grain growth theory. The grain size of WC powders with different particle sizes is identified and measured using the Electron Backscattered Diffraction (EBSD) technique. Furthermore, WC powders with larger average grain size demonstrate better performance in metal cutting applications.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Marie-Reine Manlay, Jean-Paul Garandet, Gatien Bacchetta, Mathieu Soulier, Camille Flament
Summary: This work focuses on developing Al/SiC materials using laser powder bed fusion (L-PBF) technique. The aim is to address the issue of SiC dissolution kinetics in melted aluminum to prevent or limit SiC decomposition into Al4C3. Al/SiC powder composites with SiC particles of various sizes, ranging from circa 35 nm to 4.5 μm, are successfully prepared using a standard AlSi7Mg0.6 alloy as the host material, and these composite powders are printed using a standard L-PBF equipment. The resulting parts are thoroughly characterized, and the findings are consistent with a diffusion-based numerical model that investigates the dissolution kinetics as a function of thermophysical and process parameters. An important finding is that only the largest 4.5 μm particles can be partially preserved. A general observation from this work is that thermodynamically unstable nanoparticles cannot survive the L-PBF process.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Feifei Yang, Navid Zobeiry, Ramulu Mamidala, Xu Chen
Summary: Selective laser sintering (SLS) is a popular additive manufacturing technique that can produce complex 3D parts with high mechanical performance. The polymer polyamide 12 (PA12) is commonly used in SLS due to its superior properties, but low utilization of the expensive feedstock raises sustainability concerns. Reprocessing and reusing unsintered materials is crucial, but little is known about the degradation and reusability of PA12 powders. This review summarizes the recent research on aging mechanisms and degradation behaviors of PA12 powders in SLS, covering molecular aging, microstructure evolution, mechanical property changes, and parameter settings for reclaimed PA12 powders.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xin Zhou, Jun Li, Junshan Wan, Kangwei Chen, Renquan Wang, Ying Liu
Summary: In this study, W2FeB2 alloy powder was successfully prepared using industrial FeB, tungsten powder, and amorphous boron powder as raw materials. The synthesis mechanism and phase compositions of the alloy powder were investigated. The powder morphology was optimized, resulting in improved powder fluidity and the elimination of metastable phases.
Article
Materials Science, Ceramics
S. Khajeh Mahmoodi, M. Sharifitabar, M. Shafiee Afarani
Summary: Composite powders containing TiB2 and ZrB2 particles were successfully prepared through combustion synthesis, with different mol ratios showing no significant impact on reaction velocity. Control of unwanted phases in the material was achieved by adding excess Mg under specific conditions.
CERAMICS INTERNATIONAL
(2021)
