Wei Zhu
Nanyang Technological University
Analytical chemistryBall millDielectricCeramicFabricationComposite materialThin filmMaterials scienceMineralogySinteringOxideLead zirconate titanateChemical engineeringOptoelectronicsHydrogenSelective laser sinteringAmorphous solidAnnealing (metallurgy)FerroelectricityMicrostructure
96Publications
25H-index
2,020Citations
Publications 29
Newest
#1Hui Chen (NUS: National University of Singapore)H-Index: 11
#2Wei Zhu (NTU: Nanyang Technological University)H-Index: 25
Last. Wentao Yan (NUS: National University of Singapore)H-Index: 18
view all 4 authors...
Abstract Short fiber reinforced polymer composites processed by selective laser sintering (SLS) generally show an oriented fiber structure, which leads to anisotropic properties of fabricated components. However, the formation mechanism of fiber orientation is barely investigated. In this study, the oriented structure of the carbon fiber/polyamide12 composites processed by SLS is characterized using the X-ray computed tomography, and the role of powder-spreading in formation of the fiber orienta...
Source
#1Chao Cai (NTU: Nanyang Technological University)H-Index: 32
#1Chao Cai (NTU: Nanyang Technological University)
Last. Kun Zhou (NTU: Nanyang Technological University)H-Index: 63
view all 8 authors...
Abstract Selective laser sintering (SLS) and Multi Jet Fusion (MJF) are two of the most developed powder bed fusion additive manufacturing techniques for the manufacture of polymeric components. In this work, a systematic benchmark and comparison of polyamide 12 (PA12) parts printed by SLS and MJF was conducted on the physicochemical characterization of raw powder materials (EOS PA2200 and HP 3D HR PA12) and their printed specimens, as well as the mechanical performance and printing characterist...
39 CitationsSource
#1Lisa Jiaying Tan (NTU: Nanyang Technological University)H-Index: 1
#1Lisa Jiaying Tan (NTU: Nanyang Technological University)H-Index: 3
Last. Kun Zhou (NTU: Nanyang Technological University)H-Index: 63
view all 4 authors...
Abstract Isotactic polypropylene homopolymer (iPP) and copolymer (CoPP) were comparatively investigated for selective laser sintering (SLS). The processability of the polymer powders was evaluated in terms of powder morphology, powder flowability, melting behavior, and crystallization kinetics. An isothermal differential scanning calorimetry (DSC) testing protocol was employed as an effective and efficient method to facilitate the determination of suitable powder bed temperature. The results sho...
3 CitationsSource
#1Chao Cai (HUST: Huazhong University of Science and Technology)H-Index: 32
#2Xu Wu (HUST: Huazhong University of Science and Technology)H-Index: 3
Last. Yusheng Shi (HUST: Huazhong University of Science and Technology)H-Index: 44
view all 10 authors...
Abstract This paper presents a comprehensive study conducted to optimize the selective laser melting (SLM) parameters and subsequent heat-treatment temperatures for near-α high-temperature titanium alloy Ti-6Al-2Zr-1Mo-1 V (TA15), which is widely used in the aerospace industry. Based on the surface morphology and relative density analysis, the optimized process parameters were: laser power from 230 W to 380 W, scan speed from 675 mm/s to 800 mm/s, scan spacing of 0.12 mm, and layer thickness of ...
74 CitationsSource
#1Lisa Jiaying Tan (NTU: Nanyang Technological University)H-Index: 3
#2Wei Zhu (NTU: Nanyang Technological University)H-Index: 25
Last. Kun Zhou (NTU: Nanyang Technological University)H-Index: 63
view all 3 authors...
40 CitationsSource
#1Lisa Jiaying Tan (NTU: Nanyang Technological University)H-Index: 3
#2Wei Zhu (NTU: Nanyang Technological University)H-Index: 25
Last. Kun Zhou (NTU: Nanyang Technological University)H-Index: 63
view all 3 authors...
Abstract Organically modified montmorillonite/polypropylene (OMMT/PP) composite powders for selective laser sintering (SLS) were developed using four powder preparation methods including melt extrusion combined with cryogenic grinding, thermally induced phase separation (TIPS), surface coating, and mechanical mixing. Evaluations were conducted on the shape and size, powder-bed surface roughness, and thermal behavior of the developed composite powders as well as the mechanical properties of their...
7 CitationsSource
#1Shi Yunsong (Swansea University)H-Index: 7
#2Teng Pan (HUST: Huazhong University of Science and Technology)H-Index: 1
Last. Zhidao Xia (Swansea University)H-Index: 24
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Abstract Coralline hydroxyapatite (CHA) has been used in clinical for over 20 years. However, coral is an endanger species and has been banned from mining. In addition, coral artificial bone has slow biodegradation of the defects, hindering the growth of new bone. In order to explore the natural coral artificial bone substitute materials, this work proposed using Selective Laser Sintering (SLS) to fabricate natural calcium carbonate/biopolymer composite imitation coral porous structures, and the...
6 CitationsSource
#1Wenjing Yang (NTU: Nanyang Technological University)H-Index: 2
#2Xueyu Bai (NTU: Nanyang Technological University)H-Index: 1
Last. Kun Zhou (NTU: Nanyang Technological University)H-Index: 63
view all 7 authors...
The increasing concern about noise pollution has accelerated the development of acoustic absorption and damping devices. However, conventional subtractive manufacturing can only fabricate absorption devices with simple geometric shapes that are unable to achieve high absorption coefficients in wide frequency ranges. In this paper, novel multi-layer micro-perforated panels (MPPs) with tunable wideband absorption are designed and fabricated by 3D printing or additive manufacturing. Selective laser...
9 CitationsSource
#1Rui LiH-Index: 4
#1Rui LiH-Index: 19
Last. Kun Zhou (NTU: Nanyang Technological University)H-Index: 63
view all 9 authors...
The fabrication of metal-organic framework (MOF)-based macro-materials is considered a promising strategy toward the practical applications of powder MOF crystals. In this study, selective laser sintering (SLS), an advanced three-dimensional (3D) printing method, is employed to fabricate MOF-polymer mixed matrix films (MMFs), and sintering parameters are examined systematically to investigate the universality of the SLS method, particularly for water applications. Diverse MMFs based on thermopla...
19 CitationsSource
#1Fu Hua (HUST: Huazhong University of Science and Technology)H-Index: 2
#2Wei Zhu (HUST: Huazhong University of Science and Technology)H-Index: 25
Last. Yusheng Shi (HUST: Huazhong University of Science and Technology)H-Index: 44
view all 7 authors...
Abstract Carbon fiber reinforced silicon carbide (Cf/SiC) composite was fabricated by infiltrating liquid silicon (Si) into the carbon preform, which was built by selective laser sintering (SLS) additive manufacturing process from the phenolic resin coated carbon fiber powder with addition of submicron Si. The effect of Si addition on the microstructures of the laser-sintered green part, carbon preform and derived Cf/SiC composite was investigated. The results show that the introduced submicron ...
12 CitationsSource