npj Materials Degradation最新文献_第8页

Intergranular corrosion of Ni-30Cr in high-temperature hydrogenated water after removing surface passivating film 去除表面钝化膜后高温氢化水中 Ni-30Cr 的晶间腐蚀

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-03-13 DOI: 10.1038/s41529-024-00442-0

K. Kruska, M. J. Olszta, J. Wang, D. K. Schreiber

{"title":"Intergranular corrosion of Ni-30Cr in high-temperature hydrogenated water after removing surface passivating film","authors":"K. Kruska, M. J. Olszta, J. Wang, D. K. Schreiber","doi":"10.1038/s41529-024-00442-0","DOIUrl":"10.1038/s41529-024-00442-0","url":null,"abstract":"High-resolution transmission electron microscopy and atom probe tomography are used to characterize the initial passivation and subsequent intergranular corrosion of degraded grain boundaries in a model Ni-30Cr alloy exposed to 360 °C hydrogenated water. Upon initial exposure for 1000 h, the alloy surface directly above the grain boundary forms a thin passivating film of Cr2O3, protecting the underlying grain boundary from intergranular corrosion. However, the metal grain boundary experiences severe Cr depletion and grain boundary migration during this initial exposure. To understand how Cr depletion affects further corrosion, the local protective film was sputtered away using a glancing angle focused ion beam. Upon further exposure, the surface fails to repassivate, and intergranular corrosion is observed through the Cr-depleted region. Through this combination of high-resolution microscopy and localized passive film removal, we show that, although high-Cr alloys are resistant to intergranular attack and stress corrosion cracking, degradation-induced changes in the underlying metal at grain boundaries make the material more susceptible once the initial passive film is breached.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00442-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140123811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of bias potential and dimension on electrochemical migration of capacitors for implantable devices 偏置电位和尺寸对植入式设备电容器电化学迁移的影响

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-03-04 DOI: 10.1038/s41529-024-00440-2

Shiyao Du, Feng Li, Flemming Bjerg Grumsen, Rajan Ambat, Ao Tang, Ying Li

{"title":"Effect of bias potential and dimension on electrochemical migration of capacitors for implantable devices","authors":"Shiyao Du, Feng Li, Flemming Bjerg Grumsen, Rajan Ambat, Ao Tang, Ying Li","doi":"10.1038/s41529-024-00440-2","DOIUrl":"10.1038/s41529-024-00440-2","url":null,"abstract":"Dendrite formation induced by electrochemical migration (ECM) is a common reliability problem occurring on printed circuit boards (PCBs), which significantly threatens the long-term safe operations of current implantable electronic devices (IEDs). Although several factors (i.e., contaminations, humidity, temperature) are proved to be the parameters closely related to ECM susceptibility of capacitors on a PCB under climate environments, further targeted research under other environments still needs to be conducted as ECM is highly environmental-dependent. Herein, the effects of bias potential and pitch dimension on ECM sensitivity are systematically studied using various sizes of capacitors on a test PCB under a human implantation environment. The finite element method first proves that a DC voltage pattern could be regarded as an accelerated test compared to other waveforms. Subsequent chronoamperometry tests using the DC potential further indicate that dendrite formation is closely related to pitch dimension under low bias potential, while under high bias potential electric field is also the dominating factor of dendrite formation for capacitors on a PCB. Benefiting from the electrochemical impedance spectroscopy (EIS) technique, the capacitor reliability under different corrosion states is also evaluated in a detailed manner. This work offers great value both in electronic corrosion mechanisms and future rational design for reliable IEDs.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00440-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140024843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of plasma treatment on biodegradation of natural and synthetic fibers 等离子处理对天然纤维和合成纤维生物降解的影响

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-03-01 DOI: 10.1038/s41529-024-00437-x

Marzhan Nyssanbek, Natalya Kuzina, Valery Kondrashchenko, Abdugani Azimov

{"title":"Effects of plasma treatment on biodegradation of natural and synthetic fibers","authors":"Marzhan Nyssanbek, Natalya Kuzina, Valery Kondrashchenko, Abdugani Azimov","doi":"10.1038/s41529-024-00437-x","DOIUrl":"10.1038/s41529-024-00437-x","url":null,"abstract":"This study investigates the application of plasma treatment as a means to enhance biodegradation and modify the structural characteristics of fibrous composites. The methodological component of the study includes the selection of the research object; production of composites; low-temperature plasma treatment, and treatment of biodegradability and mechanical strength of samples. The strengthening of fibers with cellulose leads to a significant improvement in mechanical strength. Such an indicator as mechanical strength increases from 18 to 21 MPa. Treatment of natural fibers with low-temperature plasma led to an increase in mechanical strength from 18 to 25 MPa. Treating reinforced fibers with low-temperature plasma currently results in an even greater enhancement in mechanical strength, increasing from 18 to 29 MPa.The electron microscopy of samples reveals some differences in cell wall microfibrils between plasma-treated and non-treated samples. The non-treated fibres are found to have chips and voids. Meantime, the plasma-treated fibres show structural changes in certain regions which resemble wood charring. Through a comprehensive analysis, this research underscores the substantial impact of plasma treatment on the degradation kinetics and morphological features of cellulose-based composites. The results reveal distinct alterations in the composition and behavior of plasma-treated fibres, signifying a shift towards enhanced biodegradability. The natural fibres examined in this study contained 28–30% lignin, whereas the composites exhibited a lower lignin content of 21–23%. These findings corroborate the inference that plasma treatment induces significant changes in fibre structure, accelerating the biodegradation process by 7 days.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00437-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140016469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrodeposited graphene/layered double hydroxides micro/nanocontainers for both passive and active corrosion protection 用于被动和主动防腐蚀的电沉积石墨烯/层状双氢氧化物微型/纳米容器

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-02-27 DOI: 10.1038/s41529-024-00443-z

Teng Xu, Qian-Yu Wang, Jin-Tao Zhang, Ji-Ming Hu

引用次数: 0

Laying the experimental foundation for corrosion inhibitor discovery through machine learning 通过机器学习为发现缓蚀剂奠定实验基础

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-02-21 DOI: 10.1038/s41529-024-00435-z

Can Özkan, Lisa Sahlmann, Christian Feiler, Mikhail Zheludkevich, Sviatlana Lamaka, Parth Sewlikar, Agnieszka Kooijman, Peyman Taheri, Arjan Mol

{"title":"Laying the experimental foundation for corrosion inhibitor discovery through machine learning","authors":"Can Özkan, Lisa Sahlmann, Christian Feiler, Mikhail Zheludkevich, Sviatlana Lamaka, Parth Sewlikar, Agnieszka Kooijman, Peyman Taheri, Arjan Mol","doi":"10.1038/s41529-024-00435-z","DOIUrl":"10.1038/s41529-024-00435-z","url":null,"abstract":"Creating durable, eco-friendly coatings for long-term corrosion protection requires innovative strategies to streamline design and development processes, conserve resources, and decrease maintenance costs. In this pursuit, machine learning emerges as a promising catalyst, despite the challenges presented by the scarcity of high-quality datasets in the field of corrosion inhibition research. To address this obstacle, we have created an extensive electrochemical library of around 80 inhibitor candidates. The electrochemical behaviour of inhibitor-exposed AA2024-T3 substrates was captured using linear polarisation resistance, electrochemical impedance spectroscopy, and potentiodynamic polarisation techniques at different exposure times to obtain the most comprehensive electrochemical picture of the corrosion inhibition over a 24-h period. The experimental results yield target parameters and additional input features that can be combined with computational descriptors to develop quantitative structure–property relationship (QSPR) models augmented by mechanistic input features.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00435-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139915800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms and kinetic model for steel corrosion in unsaturated cementitious materials 非饱和水泥基材料中的钢腐蚀机理和动力学模型

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-02-16 DOI: 10.1038/s41529-024-00441-1

Zushi Tian, Chuanqing Fu, Hailong Ye

引用次数: 0

Computational demystification of iron carbonyls formation under syngas environment 合成气环境下羰基铁形成的计算解密

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-02-16 DOI: 10.1038/s41529-024-00429-x

El Tayeb Bentria, Prathamesh Mahesh Shenai, Stefano Sanvito, Heesoo Park, Laurent Karim Béland, Nicholas Laycock, Fedwa El Mellouhi

{"title":"Computational demystification of iron carbonyls formation under syngas environment","authors":"El Tayeb Bentria, Prathamesh Mahesh Shenai, Stefano Sanvito, Heesoo Park, Laurent Karim Béland, Nicholas Laycock, Fedwa El Mellouhi","doi":"10.1038/s41529-024-00429-x","DOIUrl":"10.1038/s41529-024-00429-x","url":null,"abstract":"Iron pentacarbonyl (IPC) gas forms upon the reaction of carbon monoxide with Fe containing metallic surfaces under gas reforming conditions. IPC formation can sometimes reach alarming levels that cause metal loss, pipeline thinning corrosion, catalyst poisoning, and contamination of sensitive industrial equipment. In this work, we demystify using multiscale computational modeling the mechanism of Iron pentacarbonyl formation: Density functional theory (DFT) is used to explore various catalytic reactions that involve a Fe adatom reacting with adsorbed carbon monoxide. Our calculated carbonyls desorption barriers on a perfect and clean Fe surface are too high to allow the carbonyls to form then desorb at temperatures <500 K at the rates reported experimentally. Most importantly, our calculations indicate that a high CO surface coverage, in addition to the presence of Fe adatoms, favors carbonyl formation and its desorption towards the flowing gas medium. Using insights extracted from ab initio molecular dynamics simulations, we propose that the most plausible IPC formation mechanism consists of: (1) on surface reactions of adsorbed CO molecules with an Fe adatom to form iron tricarbonyl (Fe(CO)3*) molecules; (2) an adsorbate assisted movement of iron tricarbonyl on top of the CO adlayer; and (3) the interaction of iron tricarbonyl with CO molecules from the gaseous medium eventually leading to iron adatom removal as Fe(CO)5 gas.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00429-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139745129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of open circuit immersion and vertex potential on potentiodynamic polarization scans of metallic biomaterials 开路浸泡和顶点电位对金属生物材料电位极化扫描的影响

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-02-07 DOI: 10.1038/s41529-023-00420-y

V. K. Gattu, J. Obregon, W. L. Ebert, J. E. Indacochea

{"title":"Effects of open circuit immersion and vertex potential on potentiodynamic polarization scans of metallic biomaterials","authors":"V. K. Gattu, J. Obregon, W. L. Ebert, J. E. Indacochea","doi":"10.1038/s41529-023-00420-y","DOIUrl":"10.1038/s41529-023-00420-y","url":null,"abstract":"Electrodes made of commercially pure titanium (CP-Ti) and a CoCrMo alloy are immersed at an open circuit in a phosphate buffer saline electrolyte at room temperature for different durations prior to electrochemical analyses. Open circuit potential measurements, electrochemical impedance spectroscopy measurements, and cyclic potentiodynamic polarization (CPP) scans are used to assess the impact of the immersion time on derived property values. Stable passivation layers formed on both materials during immersion. The corrosion potentials determined from the anodic legs of CPP scans become more cathodic, and the corrosion currents decrease to lower values after longer immersion times. Measured currents indicate the layers formed on CP-Ti stabilize during forward anodic scans and persist to the vertex potential, whereas passivation breakdown occurs during anodic scans with CoCrMo with active corrosion at voltages up to the vertex potential. The characteristics of the return cathodic legs of CPP scans represent the surface conditions at the vertex potential: characteristic corrosion property values derived from the test responses represent passive surfaces on CP-Ti and leached surfaces on CoCrMo rather than intrinsic properties of those materials.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-023-00420-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139700692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of the aqueous corrosion induced alteration layer on mechanical properties of pharmaceutical glasses 水腐蚀引起的改变层对药用玻璃机械性能的影响

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-02-03 DOI: 10.1038/s41529-024-00431-3

Qiuju Zheng, Xinlin Ma, Youze Ma, Jiaxin Yu, Yuanzheng Yue, Hongtu He

{"title":"Impact of the aqueous corrosion induced alteration layer on mechanical properties of pharmaceutical glasses","authors":"Qiuju Zheng, Xinlin Ma, Youze Ma, Jiaxin Yu, Yuanzheng Yue, Hongtu He","doi":"10.1038/s41529-024-00431-3","DOIUrl":"10.1038/s41529-024-00431-3","url":null,"abstract":"It is known that network modifying ions (such as alkali or alkaline earth ions) make glasses susceptible to aqueous corrosion, resulting in the alteration of their surface layers. However, the effect of the altered layers on the mechanical properties of glasses has not been well understood. In this work we study this effect using the pharmaceutical boroaluminosilicate (BAS) glasses as objects by performing nano- and macroscale mechanical tests. The results show that extending the corrosion time increases the thickness of the alteration layer of the BAS glass. The water-related species in the alteration layer lowers the nanohardness, the reduced modulus, the nanowear resistance and Vickers hardness. The corrosion-induced “silica-like” structure in alteration layer benefits the densification of the subsurface caused by nanoindentation and nanowear, and thereby enhances the fracture toughness of the BAS glass. The correlation between the water content in the alteration layer and the mechanical properties has been revealed. This work is instrumental in the design of the next generation of pharmaceutical glasses with higher toughness.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00431-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139667715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupling of radiation and grain boundary corrosion in SiC 碳化硅中辐射和晶界腐蚀的耦合作用

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-02-01 DOI: 10.1038/s41529-024-00436-y

Jianqi Xi, Hongliang Zhang, Ranran Su, Shuguang Wei, Xuanxin Hu, Benoit Queylat, Taeho Kim, Adrien Couet, Izabela Szlufarska

引用次数: 0