Materials Research Express最新文献

Development of high-performance fiber-reinforced concrete for drilling wellbore walls in highly mineralized strata and its sulfate attack resistanceattack resistance 开发用于高矿化度地层钻井井壁的高性能纤维增强混凝土及其抗硫酸盐侵蚀性抗侵蚀性

Materials Research Express Pub Date : 2024-07-26 DOI: 10.1088/2053-1591/ad6821

Zongchuang Din, Zhishu Yao, Kun Hu, Yu Fang

{"title":"Development of high-performance fiber-reinforced concrete for drilling wellbore walls in highly mineralized strata and its sulfate attack resistanceattack resistance","authors":"Zongchuang Din, Zhishu Yao, Kun Hu, Yu Fang","doi":"10.1088/2053-1591/ad6821","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6821","url":null,"abstract":"\u0000 Metakaolin has been incorporated into high-performance fiber-reinforced concrete for wellbore wall drilling to enhance its durability in strata with highly mineralized water. This study established a benchmark, utilizing fly ash, slag powder, and metakaolin as the factors in an orthogonal test to assess the durability of concrete against sulfate attack. The range analysis and an integrated balance method were employed to optimize the mix proportion, the optimized mix proportion of high-performance concrete was determined as concrete: cement: fly ash: slag powder: metakaolin: pumping agents: gravel: sand: water: polyvinyl alcohol = 1: 0.2: 0.075: 0.05: 0.106: 2.767: 1.556: 0.371: 0.003. The apparent and microscopic morphologies before and after the erosion of both the benchmark group and optimized mix proportion group were investigated. The triaxial permeability tests were conducted on these groups under varying confining pressures to elucidate concrete permeability trends. Additionally, a damage constitutive model for concrete under a sulfate attack was formulated based on the durability tests. This study could provide valuable insights into the industrial utilization of concrete in deep shafts within highly mineralized water strata in Northwestern","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"9 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141801028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on dimple suppression in multi-point flexible stretch forming of parabolic spherical part 抛物面球形零件多点柔性拉伸成形中的凹痕抑制研究

Materials Research Express Pub Date : 2024-07-26 DOI: 10.1088/2053-1591/ad6822

Yanyan Cheng, Bin Yu, Yuzhen Gao, J. Xing

{"title":"Research on dimple suppression in multi-point flexible stretch forming of parabolic spherical part","authors":"Yanyan Cheng, Bin Yu, Yuzhen Gao, J. Xing","doi":"10.1088/2053-1591/ad6822","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6822","url":null,"abstract":"\u0000 Multi-point flexible stretch forming process applies the idea of discretization to the die and clamp of stretch forming, so that the die and clamp have high flexibility at the same time. Because surface of multi-point die is discontinuous, the sheet metal will produce dimple during the forming process, which will affect the forming effect. In order to suppress the dimple, this paper takes parabolic spherical parts as the research object, and discusses the influence of swinging unit and discrete elastic cushion on the dimples of forming parts by numerical simulation. The results show that the strain and thickness distribution are more uniform and the dimples on the surface of the forming parts are obviously reduced when the swinging unit is used. The use of discrete elastic cushions on the fixed unit and the swinging unit can further suppress the dimples of the forming part and improve the forming accuracy. In order to verify the correctness of the numerical simulation, the multi-point die for swinging unit with discrete elastic cushion was used to carry out the flexible stretch forming test of the parabolic spherical part. The test results are in agreement with the numerical simulation results, which shows that the methods are reliable and feasible.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"42 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141800072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-atom nickel on defective g-C4N3 as a promising bifunctional electrocatalyst for the OER and ORR: a first-principles analysis 缺陷 g-C4N3 上的单原子镍是一种很有前途的 OER 和 ORR 双功能电催化剂：第一原理分析

Materials Research Express Pub Date : 2024-07-25 DOI: 10.1088/2053-1591/ad674b

Teng fei Gao, Xiao-Kuan Wu, Deng Bo wen, Zhi kun kun Xin, Fang Yu, Liang Wang, Jie Zhang, Jimmy Yun

{"title":"Single-atom nickel on defective g-C4N3 as a promising bifunctional electrocatalyst for the OER and ORR: a first-principles analysis","authors":"Teng fei Gao, Xiao-Kuan Wu, Deng Bo wen, Zhi kun kun Xin, Fang Yu, Liang Wang, Jie Zhang, Jimmy Yun","doi":"10.1088/2053-1591/ad674b","DOIUrl":"https://doi.org/10.1088/2053-1591/ad674b","url":null,"abstract":"\u0000 Searching for inexpensive and highly active materials to replace noble metals for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is an important challenge. The two-dimensional semi-metallic carbon nitride g-C4N3 is an excellent candidate for electrochemical reactions owing to its eminent conductivity and stability. Here, using density functional theory (DFT) a series of low-budget non-noble transition metal single-atom (SAC) loaded on the g-C4N3 (named as TM@C4N3, TM=Cr, Mn, Fe, Co, Ni, Cu) were investigated as electrocatalysts for OER and ORR. Ni@C4N3 shows an enormous application potential as electrode material, with OER and ORR overpotentials of 0.59 V and 0.23 V, respectively. The second lowest binding energy between Ni and support g-C4N3 indicates that Ni@C4N3 possesses good overall stability. The d-band center as well as metal valence as the descriptor exhibit good agreement with the adsorption energy of the intermediate. A linear relationship exists among the adsorption energies of the three intermediates O, OH, and OOH, given the similarity that they are all bonded to the metal through one oxygen atom. By adjusting the adsorption energy of these intermediates, the catalytic activity of electrocatalysts can be tuned for OER and ORR. This study confirmed that Ni@C4N3 is a good bifunctional catalyst and provides important guidance for the design of bifunctional electrocatalysts for OER and ORR.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"53 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphene enhanced manganese dioxide functional ink infused with polyaniline for high performance screen-printed micro supercapacitor 注入聚苯胺的石墨烯增强型二氧化锰功能油墨用于高性能丝网印刷微型超级电容器

Materials Research Express Pub Date : 2024-07-25 DOI: 10.1088/2053-1591/ad674e

Shilpa Shetty, Mohammad Saquib, Selva kumar, Hadi Firouzi, Ramakrishna Nayak

{"title":"Graphene enhanced manganese dioxide functional ink infused with polyaniline for high performance screen-printed micro supercapacitor","authors":"Shilpa Shetty, Mohammad Saquib, Selva kumar, Hadi Firouzi, Ramakrishna Nayak","doi":"10.1088/2053-1591/ad674e","DOIUrl":"https://doi.org/10.1088/2053-1591/ad674e","url":null,"abstract":"\u0000 In the world of miniature advancements in technology, a current champion has emerged: the micro supercapacitors. In order to fabricate these micro-supercapacitors, we have developed a promising and user-friendly approach for printing a conductive functional ink containing a ternary composite of manganese dioxide (MnO2) nanoparticles, Graphene, and polyaniline (PANI) as a dopant. Screen-printing technique was employed to fabricate micro-supercapacitors using the nanocomposite conductive ink. The performance of the energy storage device was examined using flexible symmetric and asymmetric, with an aqueous 1M KOH electrolyte. According to this strategy, the characterisation and electrochemical study results revealed that doping PANI into both symmetric and asymmetric devices significantly increased the material's capacitive performance of areal capacitance 167 mFcm-² for MnO2/Graphene/PANI-5 composite (MGP-5) and 292.5 mFcm-² for asymmetric supercapacitor (ASSC) at 5 mVs-1. Furthermore, the asymmetric supercapacitor displayed outstanding cyclic stability, retaining 93.6% of its capacitance after 10000 cycles. This underscores the possibility of incorporating polyaniline (PANI) into MnO2 and graphene matrices as efficient blueprints for the development of superior electrode materials. The improvement represents a significant step forward, opening avenues for the future development of novel devices and their integration into top-of-the-line flexible energy storage systems.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"17 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel additively manufactured dihedral tiling architected metamaterial conformed with pentagon and rhombus: design and mechanical properties 符合五边形和菱形的新型叠加制造二面体平铺结构超材料：设计与力学性能

Materials Research Express Pub Date : 2024-07-25 DOI: 10.1088/2053-1591/ad674c

Paola Paredes Pureco, Luis Fuentes-Juvera, Luis H. Olivas-Alanis, Armando Roman-Flores, E. Cuan-Urquizo

{"title":"Novel additively manufactured dihedral tiling architected metamaterial conformed with pentagon and rhombus: design and mechanical properties","authors":"Paola Paredes Pureco, Luis Fuentes-Juvera, Luis H. Olivas-Alanis, Armando Roman-Flores, E. Cuan-Urquizo","doi":"10.1088/2053-1591/ad674c","DOIUrl":"https://doi.org/10.1088/2053-1591/ad674c","url":null,"abstract":"\u0000 The design of novel mechanical metamaterials has drawn inspiration from several sources to develop new structures. Additionally, additive manufacturing has widened the possibilities for producing intricate geometries. With this in mind, a novel architected metamaterial based on dihedral tiling is presented here, and its mechanical response is characterized experimentally. The architecture comprises two shapes: a pentagon and rhombuses, arranged in a manner dependent on each other. Three parameters were defined as variables to generate several design variations and analyze the impact of geometry on their effective mechanical properties: pentagon edge length (l), pattern rotation angle (theta), and strut thickness (t). For this purpose, the selected designs were additively manufactured using Thermoplastic Polyurethane (TPU) and tested under compression. It was found that t is directly proportional to relative density, and consequently, to apparent stiffness, while l is inversely proportional to both properties. On the other hand, theta has a minor influence on apparent stiffness and is more related to the deformed shape obtained. Overall, it was observed that the response depends on the combination of all geometrical parameters, meaning the apparent properties cannot be related to the response of only one of the shapes. This behavior differs from lattices based on a singular shape, in which the properties of the whole metamaterial are usually related to those of the unit cell.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"37 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141806099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced mechanical and tribological properties of ultrasonically assisted stir-cast AA7075 metal matrix composites in challenging corrosive environments 在具有挑战性的腐蚀环境中增强超声辅助搅拌铸造 AA7075 金属基复合材料的机械和摩擦学性能

Materials Research Express Pub Date : 2024-07-25 DOI: 10.1088/2053-1591/ad674d

M. N, J. K S, Ashok - Raj, A. D

{"title":"Enhanced mechanical and tribological properties of ultrasonically assisted stir-cast AA7075 metal matrix composites in challenging corrosive environments","authors":"M. N, J. K S, Ashok - Raj, A. D","doi":"10.1088/2053-1591/ad674d","DOIUrl":"https://doi.org/10.1088/2053-1591/ad674d","url":null,"abstract":"\u0000 Aluminum-based metal matrix composites (AMMCs) find extensive applications in aerospace, automotive, defence and various sectors on account of remarkable mechanical properties, lightweight nature, and excellent dimensional stability. In this research, AA7075 matrix material was reinforced with tungsten carbide ceramic particles with various 0, 5, 10, 15 and 20 weight percentages (wt.%) with the use of Ultrasonic assisted stir casing setup. The stir casted AA7075 MMCs were subjected to XRD, SEM, and density test to analyse the presence of elements, microstructure and density. The tensile, micro hardness, and wear test were performed on AL7075 based MMCs after conducting NaCl based spray test at the condition of spray pressure of 1.2 kg/cm2, spray duration of 120 hours and PH value of 8.2 to determine the micro hardness, Ultimate Tensile Strength and wear resistance. The XRD test confirmed the presence of secondary phases such as Al2Cu, W2C, and MgZn2 with Al and WC phases. The SEM test confirmed the uniform dispersion and no more cluster formation upto 15wt.% WC addition and agglomeration of WC was occurred in the addition of 20wt.% of WC.. The enhancing of wt.% of WC enhanced the Micro hardness, UTS, wear and corrosion resistance up to 15 wt. % addition and decreases by the 20 wt.% WC addition. The higher tensile strength 312 MPa was obtained from AA7075/15wt.%WC composite. The lower wear rate 0.11 mg/m was obtained from AA7075/15wt.%WC at 1000 m sliding distance with 1.2 m/s sliding velocity. The improved mechanical and tribological properties were mainly depended on strengthening mechanisms such as load transfer mechanism and dislocation strengthening mechanism.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"6 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Translating strain to stress: a single-layer Bi-LSTM approach to predicting stress-strain curves in alloys during hot deformation 将应变转化为应力：预测热变形过程中合金应力-应变曲线的单层 Bi-LSTM 方法

Materials Research Express Pub Date : 2024-07-23 DOI: 10.1088/2053-1591/ad66b3

Sheng Xu, Jie Xiong, Tong-Yi Zhang

{"title":"Translating strain to stress: a single-layer Bi-LSTM approach to predicting stress-strain curves in alloys during hot deformation","authors":"Sheng Xu, Jie Xiong, Tong-Yi Zhang","doi":"10.1088/2053-1591/ad66b3","DOIUrl":"https://doi.org/10.1088/2053-1591/ad66b3","url":null,"abstract":"\u0000 This study introduces a novel deep learning network that integrates a single-layer bidirectional long short-term memory (Bi-LSTM) network with a coding layer to analyze the hot deformation behavior of various alloys. The single-layer Bi-LSTM model adeptly predicts experimental stress-strain curves obtained under different deformation temperatures and strain rates, demonstrating superior effectiveness and excellent performance in modeling hot deformation behaviors of the FGH98 nickel-based alloy and TiAl intermetallic alloy. The present model achieves the coefficient of determination of 0.9051 for FGH98 and 0.9307 for TiAl alloys, whereas the corresponding values of 0.8105 and 0.8356 are obtained by the conventional strain-compensated Sellars constitutive equation (SCS model). Additionally, the mean absolute percentage error of the single-layer Bi-LSTM model are 11.37% for FGH98 and 7.16% for TiAl alloys, while the SCS model gains the corresponding error of 15.29% and 17.01%. These results show that the present model has enhances the predictive accuracy exceeding 10% for both FGH98 and TiAl alloys over the SCS model. Consequently, the proposed single-layer Bi-LSTM model provides substantial potential for optimizing manufacturing processes and improving material properties.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"122 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141812032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-cost Porous Transport Layers for Water Electrolysis Cells with Polymer Electrolyte Membranes 聚合物电解质膜水电解槽的低成本多孔传输层

Materials Research Express Pub Date : 2024-07-23 DOI: 10.1088/2053-1591/ad666e

Hiroaki Wakayama

引用次数: 0

Effect of deposition pressure on friction and wear properties of BWS2 composite coatings 沉积压力对 BWS2 复合涂层摩擦和磨损性能的影响

Materials Research Express Pub Date : 2024-07-22 DOI: 10.1088/2053-1591/ad6666

Bowei Kang, Haichao Cai, Yujun Xue, Lulu Pei, Yongjian Yu

{"title":"Effect of deposition pressure on friction and wear properties of BWS2 composite coatings","authors":"Bowei Kang, Haichao Cai, Yujun Xue, Lulu Pei, Yongjian Yu","doi":"10.1088/2053-1591/ad6666","DOIUrl":"https://doi.org/10.1088/2053-1591/ad6666","url":null,"abstract":"\u0000 This study investigated the impact of deposition pressure on the microstructure and tribological properties of B/WS2 composite coatings deposited via unbalanced magnetron sputtering. Deposition pressures of 0.6 Pa, 0.8 Pa, 1.0 Pa, 1.2 Pa, and 1.4 Pa were used during the deposition process. The microstructure and mechanical properties of the B/WS2 composite coating were characterized, and friction and wear experiments were conducted. The study found that the microhardness of the B/WS2 composite coating decreased as the deposition pressure increased. The highest hardness of the coating, reaching 8.1GPa, was observed at a deposition pressure of 0.6 Pa. This was due to the formation of Tungsten tetraborate (WB4) during the deposition process, which had a high hardness and improved the mechanical properties of the coating. The wear life of the B/WS2 composite coating was at its best, reaching 9.9×104 cycles, and the friction coefficient was at its lowest when the deposition pressure was 1.2 Pa. Selecting an appropriate deposition pressure can improve the tribological properties of B/WS2 composite coatings. Doping Boron can improve the hardness and wear resistance of the composite coatings. Abrasive wear and spalling are the two main wear forms of B/WS2 composite coatings.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":"34 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141815286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improve Anti-glare Ability of Helicopters Based on the Anti-reflective Structure of Bionic Moth Eyes 基于仿生蛾眼的防反射结构提高直升机的防眩能力

Materials Research Express Pub Date : 2024-07-19 DOI: 10.1088/2053-1591/ad65b9

Shihui Dong, Bo Zhang, Hongbo Xu

{"title":"Improve Anti-glare Ability of Helicopters Based on the Anti-reflective Structure of Bionic Moth Eyes","authors":"Shihui Dong, Bo Zhang, Hongbo Xu","doi":"10.1088/2053-1591/ad65b9","DOIUrl":"https://doi.org/10.1088/2053-1591/ad65b9","url":null,"abstract":"\u0000 This thesis focuses on the issue of glare during helicopter night navigation, which is caused by the high reflectivity of cockpit instruments, displays, and windshield surfaces. This can result in pilot eye fatigue and pose a serious threat to flight safety. To address this problem, a bionic moth eye antireflection structure is designed and prepared on the windshield glass surface using a combination of self-assembly and reactive ion beam technology. The aim is to reduce the surface reflectivity of the windshield glass and prevent glare. The anti-reflective structure comprises of conical structures with a size cycle of 100 nm and a structure height of 150 nm. The surface of both sides is microstructured, resulting in a reduction of surface reflectivity from 8% to 0.5% at the wavelength of 300 nm to 800 nm. The passing rate is increased from 92% to 99.5%, and the applicable angle is greater than 60 °. The anti-glare ability is improved by about 16 times. This thesis proposes a solution to the problem of glare during helicopter night navigation by designing and implementing a bionic moth eye antireflection structure on the windshield glass surface using self-assembly and reactive ion beam technology. The results show a significant reduction in surface reflectivity and improved anti-glare ability, which can contribute to enhancing flight safety.","PeriodicalId":510378,"journal":{"name":"Materials Research Express","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141822594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0