Article
Multidisciplinary Sciences
Dong Liu, Qin Yu, Saurabh Kabra, Ming Jiang, Paul Forna-Kreutzer, Ruopeng Zhang, Madelyn Payne, Flynn Walsh, Bernd Gludovatz, Mark Asta, Andrew M. Minor, Easo P. George, Robert O. Ritchie
Summary: This study found that CrCoNi alloy displays exceptional crack growth toughness at 20 Kelvin, with high crack-initiation fracture toughness values and crack growth toughness values. The crack-tip deformation structures at 20 K involve nucleation and restricted growth of stacking faults, fine nanotwins, and transformed epsilon martensite, with coherent interfaces.
Article
Materials Science, Multidisciplinary
Lei Wang, Xinyue Hao, Qi Su, Xiaoqin Jing, Yuntao Xi, Lei Wen, Shilei Li, Daoyong Yang, Jiangtao Ji, Shubin Lei
Summary: In this paper, a gradient grain/twin structure of CrCoNi medium entropy alloy (MEA) was constructed using ultrasonic vibration-assisted deformation. The constructed microstructure was characterized, and microhardness and uniaxial tensile testing were performed. The results showed that ultrasonic vibration surface plastic deformation significantly improved the yield strength and ultimate tensile strength of the CrCoNi MEA while maintaining its plasticity, demonstrating excellent mechanical properties.
Article
Materials Science, Multidisciplinary
Xinghang Zhang, Erica Lilleodden, Jian Wang
Summary: Nanostructured metals with abundant interfaces have significant impacts on material properties. Major findings on deformation mechanisms have been adopted by industry for advanced materials manufacturing. This article highlights recent breakthroughs and introduces the focus of current research articles, pointing out potential research directions for further investigations.
Article
Materials Science, Multidisciplinary
Yujie Chen, Xianghai An, Zhifeng Zhou, Paul Munroe, Sam Zhang, Xiaozhou Liao, Zonghan Xie
Summary: The research found that the yield strength of nanostructured alloys is size-independent, but the deformation behavior is significantly influenced by the sample size. With decreasing sample size, the deformation mode transitions from highly localized shear to apparently homogeneous deformation.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Applied
Maheshati Nuerjiang, Xue Bai, Liang Sun, Qian Wang, Xiufang Xia, Fangfei Li
Summary: Fish gelatin nanoparticles (FGNPs) with different sizes were obtained by adjusting the Gel/Glu ratio, and their generation mechanisms were revealed. These FGNPs were used to fabricate collagen composite films, which showed improved mechanical properties compared to pure collagen films. Small-sized and uniformly distributed FGNPs maintained the original structure of collagen, while large-sized and cross-linked FGNPs destabilized the collagen structure. FGNPs with a Gel/Glu ratio of 12:4 and a size of -155 nm were found to be the best for collagen film formation.
FOOD HYDROCOLLOIDS
(2023)
Article
Polymer Science
Hee-Kyeong Kim, Se-Jin Jang, Young-Sam Cho, Hyun-Ha Park
Summary: This study demonstrates a method of fabricating PCL films with a flexible and transparent nanopillar structure and shows their mechano-bactericidal potential. The PCL with nanopillars exhibits bactericidal ability against E. coli and B. subtilis, as well as bacteriostatic effects on S. aureus. The mechanically induced antibacterial function of the fabricated nanopillar structure suggests its potential application in implantable medical devices.
Article
Biochemistry & Molecular Biology
Luyao Bian, Jingchao Fu, Tingting Chang, Chuang Zhang, Chong Zhang
Summary: A curdlan blended film with exceptional mechanical strength was developed through an alkali dissolution method. The addition of bacterial cellulose significantly augmented the film's tensile strength. Experimental investigations showed that using these blended films for packaging chilled fresh meat effectively inhibited microorganism growth, maintained meat color stability, delayed protein decomposition and fat oxidation, and extended the storage time.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Jiasi Luo, Wanting Sun, Dingshan Liang, K. C. Chan, Xu-Sheng Yang, Fuzeng Ren
Summary: Superior wear resistance can be achieved by in-situ formation of an amorphous-crystalline nanocomposite layer and gradient nanostructure during wear at elevated temperatures.
Article
Multidisciplinary Sciences
Widianto P. Moestopo, Sammy Shaker, Weiting Deng, Julia R. Greer
Summary: This article introduces a new class of architected materials with interwoven components and micro-knots as building blocks. Tensile experiments show that the knot topology allows for shape retention, leading to increased absorbed energy and failure strain compared to woven structures. This exploration unlocks the potential for highly extensible low-density materials with tunable shape reconfiguration and energy absorption capabilities.
Article
Food Science & Technology
Chan Zhong, Peng-Fei Hou, Ya-Xing Li, Wen-Yu Yang, Mei Shu, Guo-Ping Wu
Summary: A novel active packaging gelatin film incorporated with protocatechuic acid was prepared, showing improved extensibility and barrier properties, with significant effects on food preservation.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
A. R. Cui, S. C. Hu, S. Zhang, J. C. Cheng, Q. Li, J. Y. Huang, S. N. Luo
Summary: The spall damage of a coarse-grained CrCoNi MEA with a face-centered-cubic structure is investigated using plate impact experiments and molecular dynamics simulations. The highest spall strength (around 4 GPa) among the MEAs/HEAs ever reported is observed, along with similar or better impact ductility. The dominant damage mode undergoes a transition from intergranular to intragranular damage with increasing impact velocity, consistent with the findings from MD simulations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Dou Ning, Wenjie Lu, Xian Luo, Yanqing Yang, Bin Huang
Summary: In this study, a gradient nanostructure (GNS) was fabricated in an equiatomic CrCoNi medium-entropy alloy by high-energy shot peening (HESP). The microstructures of the GNS samples at different depths within the deformed layer were investigated in detail. The deformation process was mainly influenced by the interaction between dislocations and deformation twins due to the low stacking fault energy (SFE) of the alloy. The formation of the nanocrystalline structure involved three stages: coarse-grained deformation, ultrafine grain deformation, and nanocrystalline deformation.
Article
Chemistry, Physical
Junling Wang, Xiaoxi Zheng, Yu Zhu, Zhirong Wang, Haobo Zhou, Shui Yu
Summary: A covalently functionalized hierarchical MnO2@LDH nanostructure (FA-MnO2@LDH) is designed to alleviate the high fire hazard problem of epoxy resin. The incorporation of 2.0 wt% FA-MnO2@LDH significantly reduces heat, smoke, and CO emissions, while improving the mechanical property. This investigation provides insights for fabricating fire-safe and mechanic robust polymer composites using hierarchically tailored nanostructure.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yujie Chen, Xianghai An, Zhifeng Zhou, Jisheng Ma, Paul Munroe, Sam Zhang, Zonghan Xie
Summary: The study discusses the preparation of a novel medium-entropy nitride using magnetron sputtering, which exhibits excellent hardness, fracture toughness, and damage tolerance. The unique microstructure and mechanisms of the new nitride open up a new frontier for the development of damage-tolerant MPENs for application under extreme loading conditions.
Article
Materials Science, Multidisciplinary
Wenlong Huo, Elena Tervoort, Silvan Gantenbein, Etienne Jeoffroy, Jinlong Yang, Andre R. Studart
Summary: This study reports a cost-effective and simple process to create strong, highly porous ceramics via direct ink writing of suspensions of hollow microspheres into cellular architectures with pores at three hierarchical levels. X-ray diffraction, rheological measurements, scanning electron microscopy, and mechanical tests are conducted to thoroughly study the processing steps and morphology of the printed hierarchical porous ceramics. The presence of pores at multiple length scales significantly increases the mechanical strength of the porous structure, providing a useful platform for the manufacturing of lightweight ceramics from inexpensive and widely available feedstock materials.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Ade Kismarahardja, Zhanxin Wang, Dongwei Li, Lihua Wang, Libo Fu, Yujie Chen, Zhanxi Fan, Ye Chen, Xiaodong Han, Hua Zhang, Xiaozhou Liao
Summary: The deformation mechanism of gold nanoribbons with unconventional hexagonal structures is investigated using atomic-resolution in situ tensile-straining transmission electron microscopy. The results reveal that plastic deformation involves three stages and includes both full and partial dislocation activities.
Review
Materials Science, Multidisciplinary
Jian Wu, Yujie Chen, Heguo Zhu
Summary: Wear is an inevitable form of material loss and failure in mechanical systems. Developing advanced materials with extraordinary wear resistance remains a great challenge. The emergence of novel high-entropy alloys (HEAs) offers great potential for reducing energy and materials losses in moving mechanical systems. This paper reviews the tribological performance of HEAs under different conditions and discusses the underlying mechanisms responsible for their excellent wear resistance. The current challenges and future outlooks are also emphasized.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Physical
Yiman Zhao, Xiaomin Zhang, Hui Quan, Yujie Chen, Shu Wang, Sam Zhang
Summary: The addition of Mo in FeCoNiCrMnMox HEA films leads to the formation of a denser film with refined grain size, promoting the transformation from a FCC phase to a mixture of FCC and BCC phases. This results in increased hardness and decreased friction coefficient, enhancing the damage tolerance of the films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yiman Zhao, Shunian Chen, Yujie Chen, Shuai Wu, Wenling Xie, Weiqing Yan, Shu Wang, Bin Liao, Sam Zhang
Summary: The study found that higher N2 gas flow rates promote higher N content in the coatings, resulting in a transformation to a face-centered-cubic (FCC) phase; the high N content allows the coating to exhibit superior hardness and excellent wear and corrosion resistance properties.
Article
Materials Science, Coatings & Films
Musharaf Abbas, Arslan Khalid, Gregory M. Smith, Paul R. Munroe
Summary: This study investigates the formation behavior of Ni particles plasma sprayed onto AISI 1008 mild steel and 316 austenitic stainless steel substrates to compare the splat formation on both surfaces. Analytical techniques were used to analyze the characteristics of the splats formed on both substrates. Most of the observed splats were halo type splats driven by Rayleigh-Taylor instabilities. A linear relationship was found between the size of the splats' central core and their outer ring of debris, which was distinct for each substrate. Diffusion analysis showed a higher degree of diffusion across the interface between splat and stainless steel substrate, suggesting a better bond efficiency for stainless steel. Cross-sectional observations and theoretical calculations showed evidence of substrate melting and metallurgical bonds for both mild steel and stainless steel substrates.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Chuhan Sha, Zhifeng Zhou, Zonghan Xie, Paul Munroe
Summary: A series of CoCrNiAlTi coatings were deposited on M2 steel substrates using DC magnetron sputtering. By adjusting the substrate bias voltage, the composition and microstructure of the coatings were modified. The coating deposited at -80V exhibited the highest hardness and damage tolerance, possibly due to the presence of nanotwins and dual-phase microstructure.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Arslan Khalid, Musharaf Abbas, Yongang Zhang, Margaret Hyland, Paul R. Munroe
Summary: This study investigates the bonding and adherence of spray particles to the substrate in thermal spray coatings. The addition of chromium to nickel promotes improved adherence and modifies the formation of the spray particles.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Shuang Peng, Jiang Xu, Zong-Han Xie, Paul Munroe
Summary: This study engineered a TiZrHfMoW refractory high entropy alloy (RHEA) nanocrystalline coating onto a commercially pure Ti substrate to improve its corrosion resistance for potential application in proton exchange membrane fuel cells (PEMFCs). The results showed that the RHEA coating exhibited enhanced corrosion resistance and maintained a stable passive state.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Rumana Akhter, Avi Bendavid, Paul Munroe
Summary: The application of a negative substrate bias in physical vapor deposition has significant effects on the surface morphology, microstructure, and mechanical characteristics of ceramic-based coatings. Increasing bias voltage results in a transition from fine columnar grains to refined equiaxed grains, accompanied by enhanced hardness and reduced defect density.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Yuhao Chen, Jiang Xu, Zong-Han Xie, Paul Munroe
Summary: In this study, a TaCN nanoceramic coating was engineered to improve the corrosion resistance and surface conductivity of metal bipolar plates in proton exchange membrane fuel cells. The TaCN coating exhibited superior corrosion resistance, significantly enhancing the performance of the titanium substrate while maintaining a passive state, making it a competitive protective coating for bipolar plates.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Ashok Meghwal, Surinder Singh, Ameey Anupam, Hannah J. King, Christiane Schulz, Colin Hall, P. Munroe, Christopher C. Berndt, Andrew Siao Ming Ang
Summary: In this study, an AlCoCrFeNi HEA coating was fabricated using gas atomized feedstock and the HVOF process. The coating exhibited resistance to surface degradation at room temperature and had high micro-and nano-hardness. However, the presence of the hard BCC/B2 phase composition led to severe brittleness and affected the wear resistance of the coating. The coating also showed superior general corrosion resistance but was susceptible to pitting corrosion due to the selective dissolution of the B2 phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Minming Jiang, Jiang Xu, Paul Munroe, Zong-Han Xie
Summary: In this study, the hydrogen storage mechanism on the CuNi co-doped MgH2(101) surface was investigated using the first-principles approach. The results showed that the most stable adsorption site for hydrogen on the surface is above the Ni atom, and there is substantial charge exchange between the hydrogen molecule and Ni atom.
Article
Engineering, Environmental
Yang Wang, Stephen Joseph, Xiang Wang, Zhe H. Weng, David R. G. Mitchell, Mitchell Nancarrow, Sarasadat Taherymoosavi, Paul Munroe, Guitong Li, Qimei Lin, Qing Chen, Markus Flury, Annette Cowie, Olivier Husson, Lukas Van Zwieten, Yakov Kuzyakov, Johannes Lehmann, Baoguo Li, Jianying Shang
Summary: Biochar amendments increased total soil carbon by 71%, 182%, and 210% for B30, B60, and B90, respectively. The application of biochar at different rates significantly increased the subsoil inorganic carbon (SIC), mainly occurring in the subsoil below 1 m. The study provided critical knowledge on the impact of biochar application on carbon stocks in subsoil in the long term.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ashok Meghwal, Samuel Pinches, Ameey Anupam, Lionel Lie, Paul Munroe, Christopher C. Berndt, Andrew Siao Ming Ang
Summary: In this study, a near-dense and crack-free CoCrFeNi medium entropy alloy (MEA) coating was fabricated using extreme-high-speed laser material deposition (EHLA). The coating retained a single-phase face-centered cubic (FCC) structure, and showed anisotropic mechanical deformation behavior at a localized level. Microstructure-mechanical property correlations confirmed the homogeneous mechanical properties of the coating at the bulk level.
Article
Nanoscience & Nanotechnology
Ashok Meghwal, Surinder Singh, Soumya Sridar, Wei Xiong, Colin Hall, Paul Munroe, Christopher C. Berndt, Andrew Siao Ming Ang
Summary: A novel high entropy alloy-medium entropy alloy composite coating was designed using a CALPHAD approach, which showed potential for industrial applications. The experimental results demonstrated that the composite coating had higher hardness and superior wear resistance, making it promising for structural applications.
SCRIPTA MATERIALIA
(2023)
