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Understanding of degradation-resistant behavior of nanostructured thermal barrier coatings with bimodal structure

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Journal of Materials Science & Technology 2019年第3期35卷 231-238页

作者： guangrong li Guanjun Yang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University State Key Laboratory for Manufacturing Systems Engineering School of Mechanical Engineering Xi'an Jiaotong University

Nanostructured thermal barrier coatings(TBCs) often provide high degradation resistance, as well as extended lifetime. However, the underlying mechanism has not been fully understood. In this study, the sintering characteristics of nanostructured yttria-stabilized zirconia(YSZ) coatings were investigated,and compared with those of the conventional YSZ coatings. Multiscale characterizations of the changes in microstructures and properties were performed. Results showed that the enhanced high-performance durability was mainly attributed to different sintering mechanisms of lamellar zones and *** characteristics of the lamellar zones were similar to those of the conventional coatings. Stagesensitive healing of two-dimensional(2 D) pores dominated the sintering behavior of the lamellar ***, the differential densification rates between nanozones and lamellar zones of the nanostructured TBCs led to the formation of coarse voids. This counteractive effect, against healing of 2 D pores, was the main factor contributing to the retardation of the performance degradation of bimodal TBCs during thermal exposure. Based on the understanding of the performance-degradation resistance, an outlook towards TBCs with higher performances was presented.

关键词： Thermal barrier coatings(TBCs) Bimodal structure Degradation-resistance Structural tailoring

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庄子生命哲学的三重内涵及其当代价值

学术探索 2024年第8期 73-81页

作者：张洁李光荣云南大学文学院云南昆明650500 西南民族大学中国语言文学学院四川成都610041

庄子生命哲学思想的三重内涵,首先,明确生命的本源,道是世间万物运行的规律,生命的本性起源于道,顺应自然是最好的状态。其次,要加强生命的修养,生命在运行过程中面临着诸多不幸和困难,包括形体层面和心灵层面遭遇的伤害,为了修养生命之... 详细信息

庄子生命哲学思想的三重内涵,首先,明确生命的本源,道是世间万物运行的规律,生命的本性起源于道,顺应自然是最好的状态。其次,要加强生命的修养,生命在运行过程中面临着诸多不幸和困难,包括形体层面和心灵层面遭遇的伤害,为了修养生命之道,庄子提倡要注重形神兼养。最后,经过不断修养,实现生命的理想,历经无用以处世、无物以游心、无己待逍遥的精神之旅,不困于外物的枷锁,不囿于自我的桎梏,超越自我,找寻到生命的价值所在。庄子生命哲学思想于我们具有启示意义。

关键词：庄子生命哲学本源修养理想

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Dynamic-stiffening-induced aggravated cracking behavior driven by metal-substrate-constraint in a coating/substrate system

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Journal of Materials Science & Technology 2021年第6期65卷 154-163页

作者： guangrong li Chunhua Tang Guanjun Yang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an710049China

Air plasma sprayed thermal barrier coatings(APS-TBCs)saw their wide application in high-temperaturerelated cutting-edge *** lamellar structure of APS-TBCs provides a significant advantage on thermal ***,short life span is a major headache for *** is highly related to the property changes and passive behaviors of the coatings during thermal ***,a finite element model was developed to investigate the dynamic stiffening and substrate constraint on total spallation *** show that the stiffening accelerates the crack propagation of *** driving force for crack propagation,which is characterized by strain energy release rate(SERR),is significantly ***,the crack starts to propagate when the SERR exceeds the fracture *** addition,the changing trends of SERR and crack propagation features are highly associated with temperatures.A higher temperature corresponds to more significant effect of stiffening on substrate *** brief,temperature-dependent stiffening significantly aggravates the substrate constraint effect on APS-TBCs,which is one of the major causes for the *** that,lowering stiffening degree is essential to maintain high strain tolerance,and to further extend the life span of *** understanding contributes to the development of advanced TBCs in future applications.

关键词： Thermal barrier coatings Substrate constraint Stiffening Crack propagation Structural design

Neoproterozoic Banded Iron Formation in the Central Tianshan, NW China: The Shalong Example

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1543-1544页

作者： LEI Ruxiong WU Changzhi li guangrong Key Laboratory of Western China's Mineral Resources and Geological Engineering Ministry of Education College of Earth Sciences and Resource Chang'an University State Key Laboratory for Mineral Deposits Research School of Earth Sciences and Engineering Nanjing University Fundamental Science on Radioactive Geology and Exploration Technology Laboratory East China Institute of Technology

Objective Banded Iron Formations （BIFs） are ferruginous chemical sedimentary rocks that precipitated throughout the Precambrain, which constitute the most important iron resources in the world. The majority of BIFs were developed in the Neoarchean and early Paleoproterozoic periods （3.2-1.8 Ga）, which are well known and have been mined for centuries. Another type of the BIFs which was formed in the Neoproterozoic period （0.85-0.7 Ga） is much smaller in scale but widespread on the Earth and record important information of the evolution of the Earth. The Neoarchean and Paleoproterozoic BIFs have been well studied and understood, while few detailed studies on Neoproterozoic BIFs have been made, and only a few modem geochronology studies were carried out on Neoproterozoic BIFs.

关键词： Pb Neoproterozoic Banded Iron Formation in the Central Tianshan NW China

Status of Silicon in Magnetite

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Acta Geologica Sinica(English Edition) 2017年第2期91卷 731-732页

作者： li guangrong GOU Fusheng WU Changzhi DONG Binbin State Key Laboratory Breeding Base of Nuclear Resources and Environment East China Institute of Technology State Key Laboratory for Mineral Deposits Research Department of Earth SciencesNanjing University

Objective Magnetite occurs widely from hydrothermal to magmatic rocks, which has inverse spinel structure. As known for long time, it carries some foreign matters, such as A1 and Ti, even silicon. Silicon and iron are quite different, either from the ionic radii or electronic obtain ability. However, both electron microprobe data and wet chemical methods analysis show that magnetite contains certain amount of silicon. Whether the silicon is similar to AI, Mg and Ti, entering into the magnetite lattice, is not clear. In addition, isomorphism would occur in both tetrahedron and octahedron in magnetite,

关键词： Si show Status of Silicon in Magnetite

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防钛火隔热层抗开裂界面粗糙化设计制备研究

中国材料进展 2024年第10期43卷 935-943页

作者：王斯佳石秋生李广荣刘梅军杨冠军西安交通大学材料科学与工程学院金属材料强度国家重点实验室陕西西安710049

钛合金在航空发动机中应用广泛,但它们在遇到剧烈冲击、摩擦等极端情况时易发生钛火,继而引起整台发动机着火,造成严重后果。在钛合金表面涂覆阻燃涂层是目前解决钛火问题的主要方法之一。然而,阻燃涂层是由陶瓷隔热层与金属基可磨耗面... 详细信息

钛合金在航空发动机中应用广泛,但它们在遇到剧烈冲击、摩擦等极端情况时易发生钛火,继而引起整台发动机着火,造成严重后果。在钛合金表面涂覆阻燃涂层是目前解决钛火问题的主要方法之一。然而,阻燃涂层是由陶瓷隔热层与金属基可磨耗面层组成的多层复合结构,在服役过程中,陶瓷/金属异质界面常发生剥落失效。基于此,主要开展陶瓷隔热层表面粗糙化设计,提升涂层抗开裂能力。首先,为确定喷涂工艺对粉末熔化程度的影响规律,采用模拟与试验相结合的方法,研究了空心与实心两种YSZ粉末粒子在等离子束流内的加热加速过程,明确了调控粉末熔化状态的控制参数,试验沉积单个扁平粒子验证了模拟结果的合理性。其次,开展了陶瓷隔热层表面形貌调控研究。基于模拟结果,确定隔热层主体应采用高功率,以保证粉末充分熔化;表面粗化层采用较低功率以获得半熔化态氧化锆球壳,从而制备得到表面具有较大粗糙度、内部具有良好隔热防钛火功能的新型隔热层结构。涂层表面的粗糙化设计,有利于提高金属陶瓷的异质界面结合强度,支撑涂层的长寿命防护。

关键词：隔热陶瓷层金属基可磨耗封严涂层界面结合界面粗糙化抗开裂设计

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新疆洪海沟矿床酸法地浸采铀试验

有色金属（冶炼部分） 2024年第8期 105-112页

作者：张青林黄群英贾志远陈立范龙黎广荣周义朋新疆中核天山铀业有限公司新疆伊宁835000 东华理工大学核资源与环境国家重点实验室南昌330013

洪海沟矿床是我国新疆千吨铀矿大基地的重要后备资源。为确立该矿床开发的适宜浸出工艺,在前期实验室研究基础上,开展了“四注一抽”规模的酸法地浸采铀试验。结果表明:该矿床微酸和低酸浸出均未达到预期浸出效果,采用3.0~4.0 g/L酸度... 详细信息

洪海沟矿床是我国新疆千吨铀矿大基地的重要后备资源。为确立该矿床开发的适宜浸出工艺,在前期实验室研究基础上,开展了“四注一抽”规模的酸法地浸采铀试验。结果表明:该矿床微酸和低酸浸出均未达到预期浸出效果,采用3.0~4.0 g/L酸度酸化、7.0~7.5 g/L酸度浸出是适宜工艺;300 mg/L剂量的H_(2)O_(2)能加速铀的浸出,但受限于溶出的Fe含量较低,氧化剂效能受限;尽管矿床碳酸盐含量不高,但浸出液Ca^(2+)、SO_(4)^(2-)持续增加易形成石膏沉淀导致抽注流量下降,需要在后续生产中予以关注。

关键词：砂岩铀矿地浸采铀酸法浸出条件试验

Comparative FISH and molecular identification of new stripe rust resistant wheat-Thinopyrum intermedium ssp. trichophorum introgression lines

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The Crop Journal 2019年第6期7卷 819-829页

作者： Jianbo li Qiheng Chen Peng Zhang Tao Lang Sami Hoxha guangrong li Zujun Yang School of life Science and Technology University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Center for Informational Biology University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina Plant Breeding Institute The University of SydneyCobbittyNew South Wales 2570Australia

Thinopyrum intermedium(2 n = 6 x = 42, JJJ^sJ^sStSt) has been hybridized extensively with common wheat and has proven to be a valuable germplasm source for improving disease resistance, quality attributes, and yield potential in wheat. We characterized new disease resistant wheat-Th. intermedium derivatives A1082 and A5-5 using sequential multi-color fluorescence in situ hybridization(mc-FISH), genomic in situ hybridization(GISH), PCRbased landmark unique gene(PLUG) and intron targeting(IT) markers. A1082 was identified as a wheat-Th. intermedium 3J disomic addition line, and A5-5 was a T4BS·5J^sL homozygous Robertsonian translocation line. Seventy-one and 106 pairs of primers amplified ***-specific bands allowing chromosomes 3J and 5J^s to be tracked, respectively. A new oligonucleotide probe, Oligo-6 H-2-100, was developed for FISH labeling of the subterminal region of the long arm of chromosome 5J^s. Both lines were highly resistant to stripe rust pathogen races prevalent in Chinese field screening nurseries. A5-5 also displayed a significant increase in tiller number compared to its wheat parent. The new lines can be exploited as useful germplasms for wheat improvement.

关键词： Disease resistance FISH GISH Stripe rust Triticum aestivum

Breeding ecology of two sympatric laughingthrushes(Trochalopteron milnei and Garrulax berthemyi)in southwestern China

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Avian Research 2022年第2期13卷 226-228页

作者： Canchao Yang Xiaogang Yao Yan Cai guangrong li Wei liang Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou571158China Kuankuoshui National Nature Reserve Suiyang563300China

Here we documented up-to-date information on breeding ecology of Buffy Laughingthrush(Garrulax berthemyi),an endemic species of China,and a sympatric coordinal Red-tailed Laughingthrush(Trochalopteron milnei),in southwestern ***,we compared breeding ecology of these two sympatric *** significant differences were found in clutch size,egg size,nest size,nest height,nest habitat and predation rate between these two species except nests depth,nests cover and eggs *** Red-tailed Laughingthrush nestlings differed from those of the Buffy Laughingthrush in gape morphology and the extent of *** of breeding behavior showed that cooperative breeding might exist in the population of Buffy Laughingthrush.

关键词： Breeding density Cooperative breeding Predation rate Reproduction