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Friction 2024年第7期12卷 1564-1579页

作者： Linlin duan Dan JIA Jian LI Jianfang LIU haitao duan State Key Laboratory of Special Surface Protection Materials and Application Technology Wuhan Research Institute of Materials ProtectionWuhan 430030China Hubei Longzhong Laboratory Xiangyang 441000China College of Life Science and Technology Wuhan Polytechnic UniversityWuhan 430030China

In this work,the advantage of Coulomb repulsion in the intermolecular forces experienced by molecules on the solid–liquid nanosized contact interface is taken,and the superior friction-reducing property of Cu_(3)(PO_(4))2·3H_(2)O(CuP)oil-based additives has been confirmed for titanium ***-dimensional(3D)CuP nanoflowers(CuP-Fs)with a strong capillary absorption effect are prepared to achieve the homogeneous mixing of solid CuP and lubricating *** by CuP-Fs additives for titanium alloy,friction coefficient(COF)can be reduced by 73.68%,and wear rate(WR)reduced by 99.69%.It is demonstrated that the extraordinary friction-reducing property is due to the repulsive solid–liquid interface with low viscous shear force originating from Coulomb repulsion between polar water molecules in CuP and non-polar oil ***,any steric hindrance or connection between this repulsive solid–liquid interface will trigger the adhesion and increase the viscous shear force,for example,dispersant,hydrogen bondings,and shaky adsorbed water ***,the lamellar thickness of CuP and the molecular size of lubricant both have a great influence on tribological *** the lubrication mechanism based on interface Coulomb repulsion is proposed that may help broaden the scope of the exploration in low-friction nanomaterial design and new lubricant systems.

关键词： lubrication nanomaterial additive solid-liquid interface wear

鄂尔多斯侏罗纪矿区“四控一检”顶板钻孔疏放水技术

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陕西煤炭 2024年第8期43卷 95-98,145页

作者：段海涛中煤西北能源化工集团有限公司内蒙古鄂尔多斯017200

鄂尔多斯盆地侏罗纪煤田矿井普遍受顶板砂岩水水害的威胁,疏放水工程量普遍较大,目前没有一定的布设方式、规范可供参考。在分析母杜柴登矿井30201工作面不同阶段疏放水量变化的基础上,结合研究区域范围内顶板砂岩水水害的特点,对不同... 详细信息

鄂尔多斯盆地侏罗纪煤田矿井普遍受顶板砂岩水水害的威胁,疏放水工程量普遍较大,目前没有一定的布设方式、规范可供参考。在分析母杜柴登矿井30201工作面不同阶段疏放水量变化的基础上,结合研究区域范围内顶板砂岩水水害的特点,对不同属性的补给进行分析,得出顶板砂岩水静储量为前置疏放对象、动态补给为常态,并提出了包含4种连续控制手段、一种检验措施在内的“四控一检”顶板钻孔疏放水技术。首采工作面的实践表明,在保障工作面安全回采的基础上,采用“四控一检”的方法,能够使疏放水钻孔布置更加合理,可有效减少疏放水工程量,做到了降本增效,为顶板砂岩水水害矿井在安全高效生产方面提供了一定的借鉴和参考。

关键词：侏罗纪煤田矿井水害砂岩水四控一检疏放水

近水平煤层长距离采空区定向疏水钻孔选择方法研究

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河南科技 2024年第11期51卷 45-48页

作者：段海涛中煤西北能源化工集团有限公司内蒙古鄂尔多斯017200

【目的】为解决近水平煤层长距离采空区定向疏水钻孔选择的难题,需要一套量化评价的方法,为矿井探放水工程施工提供依据。【方法】本研究通过构建近水平煤层长距离采空区定向疏水钻孔水量计算模型,以伯努利方程为基础,综合分析开孔位置... 详细信息

【目的】为解决近水平煤层长距离采空区定向疏水钻孔选择的难题,需要一套量化评价的方法,为矿井探放水工程施工提供依据。【方法】本研究通过构建近水平煤层长距离采空区定向疏水钻孔水量计算模型,以伯努利方程为基础,综合分析开孔位置、孔径、孔深等参数,推导单孔及分支孔涌水量计算公式。【结果】以母杜柴登煤矿实际施工的采空区定向疏水钻孔为例,分析对比计算公式的准确性,同时对近水平煤层条件下单孔与分支孔水量、经济效益进行对比分析。【结论】得出了近水平煤层长距离采空区定向疏水钻孔布置的影响因素和选择方法。该方法准确性较高、计算简便,为类似矿井采空区水害治理提供了一定的借鉴和参考。

关键词：近水平采空区定向钻孔选择方法

Nanomaterials for lubricating oil application:A review

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Friction 2023年第5期11卷 647-684页

作者： Linlin duan Jian LI haitao duan State Key Laboratory of Special Surface Protection Materials and Application Technology Wuhan Research Institute of Materials ProtectionWuhan 430030China

Friction and wear are ubiquitous,from nano-electro-mechanical systems in biomedicine to large-scale integrated electric propulsion in aircraft *** of nanomaterials as lubricating oil additives have achieved great advances,which are of great significance to control friction and *** review focuses on the applications of nanomaterials in lubricating oil and comprehensively compares their tribological characteristics as lubricating oil *** analysis of tribology data is provided and discussed accordingly;moreover,the interaction between nanomaterials and sliding surface,lubricating oil,other additives,and synergistic lubrication in nanocomposites are systematically ***,suggestions for future research on nanomaterials as lubricating oil additives are ***,this review will promote a better fundamental understanding of nanomaterials for lubricating oil application and help to achieve the superior design of nanoadditives with outstanding tribological performances.

关键词： nanomaterial additive friction modifier lubrication wear

非暴露技术胃部分切除术治疗胃黏膜下层肿瘤的临床可行性分析

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大连医科大学学报 2024年第3期46卷 217-220页

作者：段海涛梁品大连医科大学附属第一医院胃肠外科辽宁大连116011

目的观察非暴露技术(Clean-net)胃部分切除术治疗胃黏膜下层肿瘤的临床治疗效果及可行性。方法回顾性分析2018年1月至2021年11月大连医科大学附属第一医院胃肠外科收治的术前诊断考虑胃黏膜下层肿瘤17例患者的临床资料,其中男7例,女10例... 详细信息

目的观察非暴露技术(Clean-net)胃部分切除术治疗胃黏膜下层肿瘤的临床治疗效果及可行性。方法回顾性分析2018年1月至2021年11月大连医科大学附属第一医院胃肠外科收治的术前诊断考虑胃黏膜下层肿瘤17例患者的临床资料,其中男7例,女10例;平均年龄(57.8±11.9)岁。所有患者均行Clean-net胃部分切除手术,在腹腔镜下切开浆肌层,行不损伤黏膜层的肿瘤剥除术,评估其治疗效果。结果17例患者均顺利完成手术,无一例因术中并发症中转开腹,切除瘤体平均直径(4.1±1.8)cm,肿瘤最大直径9.0 cm。术后留置胃管时间(2.5±1.9)d。术后1例患者发热,考虑肺部感染,治疗后缓解。术后恢复流质饮食时间(3.8±2.0)d,术后住院时间(6.5±1.8)d。术后病理间质瘤12例,其中5例低危,4例中危,3例高危。囊肿2例,平滑肌瘤1例,神经鞘瘤1例,胰腺异位1例,所有标本均有完整的包膜。结论Clean-net治疗胃黏膜下层肿瘤短期治疗效果满意,对于保留胃部形态,尤其对于近贲门处肿瘤术后胃功能恢复好,可作为特殊部位(近贲门、近幽门)胃黏膜下肿瘤的保功能手术方式。

关键词：胃部分切除黏膜下层非暴露技术

CrN/TiAlN多层涂层的微观结构和摩擦磨损性能

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中国表面工程 2024年第3期37卷 232-241页

作者：田峰段海涛潘邻许鑫宇秦江林魏琴琴罗国强国营武汉新宇机器厂武汉430060 武汉材料保护研究所特种表面防护材料及应用技术国家重点实验室武汉430030 武汉理工大学材料复合新技术国家重点实验室武汉430070

特种装备车辆往往在高速、高冲击等复杂环境下运行,底盘选装密封件表面容易被磨损造成密封失效,在密封工作面制备硬质涂层是提高服役寿命、延长维修周期的重要方法。采用物理气相沉积法在45#钢表面制备单层CrN涂层和不同过渡层厚度的多... 详细信息

特种装备车辆往往在高速、高冲击等复杂环境下运行,底盘选装密封件表面容易被磨损造成密封失效,在密封工作面制备硬质涂层是提高服役寿命、延长维修周期的重要方法。采用物理气相沉积法在45#钢表面制备单层CrN涂层和不同过渡层厚度的多层CrN/TiAlN涂层,用X射线衍射仪、扫描电子显微镜、表面轮廓仪、纳米压痕仪和往复式摩擦磨损试验机,研究涂层的微观结构、机械性能和摩擦磨损性能。结果表明单层CrN涂层厚度为0.87μm,其硬度和模量最小为19.49 GPa和160.53 GPa。CrN/TiAlN多层涂层的硬度和模量明显提高,且随过渡层厚度增加而增大,4CrN/TiAlN涂层的硬度和模量可达到39.86 GPa和386.72 GPa。在空气环境下的摩擦磨损试验中,单层CrN涂层被快速破坏;CrN/TiAlN多层涂层的平均摩擦因数随着过渡层厚度的增加先增大后减小,最大磨损深度和磨痕截面积不断下降。4CrN/TiAlN涂层具有最优摩擦磨损性能,其平均摩擦因数为0.792 5,磨痕截面积为315.09μm^(2),磨损机理为磨粒磨损和少量粘着磨损。提高过渡层厚度能够降低基体的塑性变形,降低涂层与基体的物理性能差异,减少涂层开裂并提高涂层摩擦磨损性能。通过调控过渡层厚度获得性能优异的CrN/TiAlN多层涂层,研究成果可应用于车辆旋转密封件上,显著提高密封工作面耐磨损性能。

关键词： 45#钢 CrN涂层 CrN/TiAlN 多层涂层耐磨性磨损机制

激光表面织构技术调控材料摩擦学性能的研究进展

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表面技术 2024年第9期53卷 85-101,157页

作者：李文轩段海涛李国政詹胜鹏章武林马利欣贾丹武汉材料保护研究所有限公司特种表面保护材料及应用技术国家重点实验室武汉430030 湖北隆中实验室湖北襄阳441000

表面织构是提高工程材料摩擦学性能有效的表面改性方法之一。近年来多种表面织构技术已被应用于提高材料表面减摩耐磨性能,而在众多表面织构化技术中,激光表面织构技术由于具有加工速度快、生产效率高、可控性好等优点而被广泛应用。综... 详细信息

表面织构是提高工程材料摩擦学性能有效的表面改性方法之一。近年来多种表面织构技术已被应用于提高材料表面减摩耐磨性能,而在众多表面织构化技术中,激光表面织构技术由于具有加工速度快、生产效率高、可控性好等优点而被广泛应用。综述了激光表面织构的最新进展及应用,讨论了目前激光表面织构技术存在的问题及解决方法,总结了3种不同加工原理下的激光处理方法存在的问题,包括形状参数难控制、精度较差及灵活性较低等,并介绍了液相辅助加工技术在激光表面织构技术中的应用,同时分析了不同工艺参数包括密度、形状及深度等对材料摩擦学性能的影响。综述了激光表面织构技术复合涂层技术的研究现状,其中激光表面织构与非金属或金属涂层复合,包括氧化石墨烯填充PTFE涂层复合激光表面织构、复合热丝化学气相沉积增强激光表面织构、复合电液雾化增强激光表面织构及复合激光熔覆技术增强激光表面织构。总结了激光表面织构技术结合不同润滑技术对材料摩擦学性能的影响。最后展望了激光表面织构在各个领域的未来发展方向。

关键词：激光加工表面织构摩擦性能涂层复合工艺参数

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Tribological performance of TiAlSiN and TiAlCrN/TiAlN coating blades

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Science China(Technological Sciences) 2014年第2期57卷 345-350页

作者： TU JieSong duan haitao XU JianHua LI Jian R & D Center Wuhan Research Institute of Materials Protection

A new laboratory evaluation method for the coating blade was developed, and the tribological properties of coating blades with different Ti-based coatings were studied by UMT-2 tribometer. Comparison between the areas of scratches before and after the cutting experiment was used to evaluate the cutting performance of the blades. Results showed that friction coefficient of TiA1CrN/TiA1N coating was significantly lower than that of TiA1SiN coating. Analysis of the worn surface revealed that the TiA1SiN and TiAICrN/TiA1N coatings in the dry turning process exhibited sign of inhornogeneous adhesive wear and abrasive wear. TiA1CrN/TiA1N coating has a longer working life and better anti-wear property because of its duplex coating.

关键词： duplex coating wear mechanism NC blade adhesive wear

Development of Atmosphere-controlled Tribometer and Fail-safe Analysis

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Chinese Journal of Mechanical Engineering 2012年第5期25卷 1052-1059页

作者： duan haitao PEI Zhaohui WU Yong TU Jiesong LI Jian Wuhan Research Institute of Materials Protection Wuhan 430030 China State Key Laboratory of Tribology Tsinghua University Beijing 100084 China

The design of existing tribometer mainly focuses on normal pressure and environmental conditions, and aims to measure the effect of load and speed on material performance. The effect of gas pressure and environmental condition on performance of materials is usually not considered. Thus, data from friction tests are not precise. In this paper, a new atmosphere tribometer is developed to study the tribological behavior of materials under severe rugged atmosphere. A fail-safe analysis is performed through reproducibility, comparability, and sensitivity tests. The tribometer allows tests to be performed in block-circle disc line contact, pin-circle disc line contact, and block-circle disc face contact configurations at controlled atmosphere and gas pressure. A self-centering plant is designed to settle the poor contact problem. A pin-on-disk test is conducted, and the test results indicate that the proposed design is efficient. A combined sealing style is introduced to control gas leaks. Compared with other sealing styles, the combined sealing is found to meet the experiment requirements best. And the reproducibility, comparability, and sensitivity tests validate the performance of the tribometer. The designed atmosphere tribometer reliably simulates the friction test under extremely harsh conditions, enhances the ability for material tribological properties test, and ensures accuracy of the tribological data.

关键词： tribometer atmosphere polymer tribological properties

Evalution of Thermal Oxidative Degradation of Trimethylol-propane Trioleate by TG/DTA/DSC

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Journal of Wuhan University of Technology(Materials Science) 2021年第2期36卷 280-288页

作者： ZHAN Wen duan haitao LI Xinxiang LI Jian YUAN Chengqing Wuhan Research Institute of Materials Protection China Academy of Machinery Science and TechnologyWuhan 430030China School of Energy and Power Engineering Wuhan University of TechnologyWuhan 430063China

In order to evaluate the thermal oxidation degradation behavior of lubricant with different antioxidants,the thermal kinetics equation based on the anlyses of thermogravimetry(TG),differential thermal analysis(DTA),and differential scanning calorimetry(DSC)was established,respectively,to calculate the activation energy of lubricant thermal-oxidative *** thermal analyses of TG and DTA were employed to determine the thermal decomposition properties of ester oils trimethylolpropane trioleate(TMPTO)with butyl-octyl-diphenylamine/octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate/amine-phenol combination *** activation energy of the lubricating oil adding antioxidant is increased relative to the TMPTO base oil,and the order of activation energy are Ec(93.732 kJ·mol^(-1))>Ed(88.71 kJ·mol^(-1))>Eb(58.41 kJ·mol^(-1))>Ea(46.32 kJ·mol^(-1)).The experimental results show that octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate in TMPTO has favorable resistance to thermal oxidation and *** thermal analysis method of DSC accurately reflects the heat exchange of lubricant thermal-oxidative *** order of activation energy is calculated to ED(144.385 kJ·mol^(-1))>EC(110.05 kJ·mol^(-1))>EB(97.187 kJ·mol^(-1))>EA(66.02 kJ·mol^(-1)).It is illustrated that the amine-phenol combination antioxidant has the best thermal oxidation resistance,which is the same as what the oxidation onset temperature effected.

关键词： thermal oxidative degradation thermal kinetics antioxidants trimethylolpropane oleate