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Latest articles for Journal of Physics: Conference Series

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  • Establishment of cross-linked structures of cyanate ester resin based on LAMMPS
    Cyanate ester (CE) resins form a highly crosslinked network structure through cyclotrimerization reactions, which endows them with excellent mechanical, thermal, and dielectric properties while also resulting in significant brittleness. Enhancing the toughness of CE resins while preserving their inherent advantageous properties remains a critical research challenge. To address this issue, we employ all-atom molecular dynamics (MD) simulations to elucidate the relationship between the microstructure and macroscopic mechanical properties of CE resins. Using the open-source software LAMMPS, we control the multi-site polymerization reactions to closely simulate the actual curing process of CE resins, thereby constructing a randomly crosslinked triazine network. The CE resin crosslinking model developed through this approach demonstrates reliable predictive capabilities for physical and thermomechanical properties. This study introduces a novel method for constructing the structure of CE resins and provides new insights into the toughening modifications of CE resins through molecular dynamics simulations.

  • Preface
    This collection is the conference proceedings of the Chinese Materials Conference 2024 as well as the Second World Materials Conference, co-sponsored by the Chinese Materials Research Society (C-MRS) and the European Materials Research Society (E-MRS) and supported by Guangdong University of Technology. The conference, which contains 92 symposia and forums, is one of the largest conferences held by C-MRS in recent years, with more than 25,000 people attending the conference. Meanwhile, the conference opened a number of forums, including the youth forum, the special new material forum, the material education forum, the material journal forum, etc. In addition, the international new material scientific research instruments and equipment exhibition was also held. The collection is consist of 60 papers varied in five categories of topics: energy materials, environmental materials, advanced structural materials, functional materials, material design, preparation and evaluation. List of Committees are available in this pdf.

  • Peer Review Statement
    All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Single Anonymous • Conference submission management system: Morressier • Number of submissions received: 67 • Number of submissions sent for review: 70 • Number of submissions accepted: 60 • Acceptance Rate (Submissions Accepted / Submissions Received × 100): 89.6 • Average number of reviews per paper: 2.01 • Total number of reviewers involved: 63 • Contact person for queries: Name: Email: cmcpapers@126.com Affiliation: Chinese Materials Research Society

  • Effect of Interfacial Protrusion Defects on the Electrical Strength of Cross-linked Polyethylene
    Interfacial protrusion defects between the insulation layer and the semiconducting shield of cross-linked polyethylene cables can distort the electric field in nearby areas, posing risks to the safe and reliable operation of the cables. This study prepared specimens with various forms of interfacial protrusions under laboratory conditions using two types of insulating materials, including cross-linked polyethylene (XLPE) for medium-voltage and for high-voltage. The effects of these protrusion defects on the electrical strength and life index of XLPEs were evaluated through breakdown test. The results indicate that the breakdown strength of both medium-voltage and high-voltage XLPEs decreases as the size of the shielding-to-insulation protrusions increases. The life index of the medium-voltage XLPE is 13.50, while that of the high-voltage XLPE is higher at 17.23. Specifically, the life index of the medium-voltage XLPEs decrease with increasing interfacial protrusion size, reaching a minimum of 10.84 at 200 μm. Conversely, the life index of the high-voltage XLPEs increase with larger interfacial protrusions. These findings provide valuable insights for the design and manufacturing of medium and high-voltage XLPE insulated cables.

  • Effect of Solution Heat Treatment on Microstructure and Properties of CoCrMo Alloy
    The as-cast microstructure of low carbon CoCrMo alloy was studied by means of optical microscope, scanning electron microscope and tensile tester, and the microstructure and properties after heat treatment for 30min, 60min and 120min at 1150 °C, 1200 °C and 1250 °C were studied. The results show that the element segregation and M23C6 content in the alloy are decreased by solution treatment. The tensile strength and plasticity of the alloy increase with the increase of solution time. At 1250 °C, the tensile strength and plasticity of the alloy increase first and then decrease with solution temperature and solution time. The element segregation in the alloy is serious, and with the increase of holding temperature and time, the element segregation of Mo decreases. Solid solution heat treatment at 1150 °C and 1200 °C reduces the segregation and carbides decompose and disperse uniformly into the matrix, which improves the strength and plasticity of the alloy. However, at 1250 °C/120min, the growth of grains makes the strength and plasticity of the alloy decrease.