检索结果-南通市图书馆

Effects of Primary Carbide Size and Type on the Sliding Wear and Rolling Contact Fatigue Properties of M50 Bearing Steel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2023年第8期36卷 1336-1352页

作者： Liqi Yang Weihai Xue Siyang Gao Yanfei Cao Hongwei Liu deli duan Dianzhong Li Shu Li Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

The influences of primary carbide size and type on the sliding wear behavior and rolling contact fatigue (RCF) properties of M50 bearing steel were systematically investigated under oil lubrication condition. A major breakthrough was achieved in the influence of primary carbide on tribological behavior. The opposite effect brought by primary carbide size on the sliding wear resistance and RCF life of M50 bearing steel was determined. Wear resistance increased with an increase in the studied primary carbide size, whereas RCF life decreased significantly. Compared with the 0 R and R positions with a relatively small carbide size, the wear volume of the 1/2 R position with a large carbide size was the smallest. Compared with the 0 R and R positions, the L10 life of the 1/2 R position decreased by 82.7% and 84.8%, respectively. On the basis of the statistical correlation between primary carbide size and the two tribological properties, a critical maximum carbide size of 5-10 μm was proposed to achieve optimal tribological performance. This research suggests that the equivalent diameter of the primary carbide should be controlled to be smaller than 10 μm, but further decreasing primary carbide size to less than 5 μm is unnecessary. The influence of primary carbide type in M50 bearing steel on sliding wear resistance was also discussed. Results indicate that the MC-type carbides with higher elastic modulus and microhardness exhibit better wear resistance than the M2C-type carbides.

关键词： Carbide size Carbide type Sliding wear Rolling contact fatigue M50 bearing steel

High-Speed Rubbing Behavior of Abrasive Coating Coated on Titanium Alloy Blade Tips

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 749-762页

作者： Wenshuang Gu Shuai Yang Shiyi Zhang Zhiliang Pei Weihai Xue deli duan Jun Gong Chao Sun Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

In aero-engines, abrasive coatings are typically utilized to protect the blade tip from excessive wear caused by the harder abradable sealing coating and thereby improve the sealing performance of engines. Therefore, a Ni/cBN abrasive coating was prepared on titanium alloy using electrodeposition. The high-speed rubbing tests with a linear velocity of 350 m/s and different incursion rates were performed to investigate the effect of the Ni/cBN abrasive coating on the wear behavior against NiCrAl/diatomite seal coating. Results showed that melting wear and adhesive transfer occurred on the bare blades, causing the bare blade to suffer excessive wear. While the Ni/cBN abrasive coating exhibited superior wear resistance and cutting performance. The cBN grits pullout, the abrasion of Ni matrix and transfer of seal coating to the cBN grits were the main wear mechanism of the Ni/cBN abrasive coating. Additionally, it was found that the relationship between the incursion rate and high-speed rubbing behavior is quite different for the bare blade and Ni/cBN coating. The reason for the difference in wear behavior of bare blade and Ni/cBN coating at different incursion rates was discussed in detail.

关键词： Gas turbine sealing Abrasive coating High-speed rubbing Material transfer Abradable coating

Wear-resistant Ag-MAX phase 3D interpenetrating-phase composites:Processing,structure,and properties

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第2期17卷 806-819页

作者： Yu Guo Xi Xie Zengqian Liu Longchao Zhuo Jian Zhang Shaogang Wang Qiqiang duan Qing Jia Dake Xu Weihai Xue deli duan Filippo Berto Zhefeng Zhang Rui Yang Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China Electrobiomaterials Institute Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)Northeastern UniversityShenyang 110819China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Chemical Engineering Materials and EnvironmentSapienza University of RomeRoma 00185Italy

Electrical contact materials are generally Ag-or Cu-based composites and play a critical role in ensuring the reliability and efficiency of electrical equipments and electronic *** MAX(M is an early transition metal,A is an element from III or IV main groups,and X is carbon or/and nitrogen)phase ceramics display a unique combination of properties and may serve as an ideal reinforcement phase for electrical contact *** biological materials evolved in nature generally exhibit three-dimensional(3D)interpenetrating-phase architectures,which may offer useful inspiration for the architectural design of electrical contact ***,a series of bi-continuous Ag-Ti_(3)SiC_(2) MAX phase composites with high ceramic contents exceeding 50 vol.%and having micron-and ultrafine-scaled 3D interpenetrating-phase architectures,wherein both constituents were continuous and mutually interspersed,were exploited by pressureless infiltration of Ag melt into partially sintered Ti_(3)SiC_(2) *** mechanical and electrical properties as well as the friction and wear performance of the composites were investigated and revealed to be closely dependent on the ceramic contents and characteristic structural *** composites exhibited a good combination of properties with high hardness over 2.3 GPa,high flexural strength exceeding 530 MPa,decent fracture toughness over 10 MPa·m^(1/2),and good wear resistance with low wear rate at an order of 10^(-5)mm^(3)/(N·m),which were much superior compared to the counterparts made by powder metallurgy *** particular,the hardness,electrical conductivity,strength,and fracture toughness of the composites demonstrated a simultaneous improvement as the structure was refined from micron-to ultrafine-scales at equivalent ceramic *** good combination of properties along with the facile processing route makes the Ag-Ti_(3)SiC_(2)3D interpenetrating-phase composites appealing for electrical contact applicatio

关键词： three-dimensional(3D)interpenetrating-phase architecture Ag-MAX(M=early transition metal A=element from III or IV main groups and X=carbon or/and nitrogen)phase composites melt infiltration electrical contact materials mechanical

泡沫电热合金陶瓷涂层的制备及其高温氧化行为

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料研究学报 2017年第8期31卷 603-611页

作者：胡晓娜段德莉刘俊李曙中国科学院金属研究所沈阳110016 上海空间推进研究所上海201112

利用真空浸渍和高温熔烧方法在泡沫Ni Cr20电热合金表面制备了陶瓷涂层,研究了其在1000℃的恒温氧化行为和热震行为,通过拉伸实验评价了涂层对氧向合金中扩散的阻挡效果。试验结果表明,在构成泡沫结构的金属棱内外表面得到均匀致密的陶... 详细信息

利用真空浸渍和高温熔烧方法在泡沫Ni Cr20电热合金表面制备了陶瓷涂层,研究了其在1000℃的恒温氧化行为和热震行为,通过拉伸实验评价了涂层对氧向合金中扩散的阻挡效果。试验结果表明,在构成泡沫结构的金属棱内外表面得到均匀致密的陶瓷涂层,涂层薄且与基体结合良好,能显著提高泡沫Ni Cr20电热合金在1000℃的恒温氧化性能和抗热震性能,表观拉伸强度保持在2 MPa。

关键词：金属材料泡沫电热合金陶瓷涂层真空浸渍熔烧恒温氧化性能热震性能拉伸性能

钛合金表面TiB2涂层与纯铝的高温黏着磨损行为

在线全文

学校读者我要写书评

暂无评论

中国表面工程 2022年第3期35卷 64-72页

作者：吴彼高禩洋薛伟海段德莉李曙中国科学院金属研究所师昌绪先进材料创新中心沈阳110016

航空发动机低压气机机匣内表面Al基封严涂层的使用,可以通过其自身的磨耗实现保护TC4叶尖的目的,但同时Al基封严涂层中以Al为主的基体材料易于大量黏着转移至TC4叶尖表面,使叶尖长度增加,影响发动机运行稳定性。采用直流脉冲磁控溅射工... 详细信息

航空发动机低压气机机匣内表面Al基封严涂层的使用,可以通过其自身的磨耗实现保护TC4叶尖的目的,但同时Al基封严涂层中以Al为主的基体材料易于大量黏着转移至TC4叶尖表面,使叶尖长度增加,影响发动机运行稳定性。采用直流脉冲磁控溅射工艺在钛合金表面沉积TiB_(2)涂层,以期实现抗Al黏着磨损目的。具有致密结构的TiB_(2)涂层在钛合金表面膜基结合临界载荷(LC4)达85.4 N。在高温销-盘摩擦磨损试验机上评价钛合金表面TiB_(2)涂层与纯铝销对摩(室温至450℃)的抗Al黏着磨损性能。与TC4基体相比较,TiB_(2)涂层可有效抑制Al的黏着转移。对摩铝销磨斑具有拖尾特征和剪切舌特征。铝销向TiB_(2)涂层表面的机械涂抹和铝销对Al黏着转移层的剪切去除作用相互竞争,共同控制Al的黏着转移行为。TiB_(2)涂层磨痕内保持低表面粗糙度可减小高温软化铝销的机械涂抹倾向。同时TiB2涂层与Al黏着转移层间优异的化学稳定性可阻碍界面反应进行,降低界面结合强度,进而促进铝销对Al黏着转移层的剪切去除作用。钛合金表面TiB2涂层通过抑制铝销机械涂抹并增强铝销对Al黏着转移层的剪切去除而获得优异的抗Al黏着磨损性能。

关键词：二硼化钛纯铝高温摩擦磨损黏着转移

在线全文

学校读者我要写书评

暂无评论

表面织构下钛合金不同周次的微动磨损行为

中国表面工程 2022年第3期35卷 73-83页

作者：王剑飞薛伟海高禩洋段德莉李曙中国科学院金属研究所辽宁省航发材料摩擦学重点实验室沈阳110016 中国科学技术大学材料科学与工程学院沈阳110016

在航空发动机中,钛合金零部件的微动磨损不可避免。表面织构能在一定程度上减缓微动磨损,然而目前对表面织构下钛合金不同周次微动磨损行为的认识尚有不足。在TC4钛合金表面通过激光加工制备不同方向的沟槽状表面织构,随后进行不同周次... 详细信息

在航空发动机中,钛合金零部件的微动磨损不可避免。表面织构能在一定程度上减缓微动磨损,然而目前对表面织构下钛合金不同周次微动磨损行为的认识尚有不足。在TC4钛合金表面通过激光加工制备不同方向的沟槽状表面织构,随后进行不同周次的微动磨损试验。试验结果表明,在磨损的初期,有垂直方向表面织构的样品微动循环图更“瘦长”;随着磨损的进行,磨屑的分布状态发生了改变,其微动循环图变的和平行织构的样品以及无织构的样品相同。整个磨损过程随微动周次增加,分为黏着阶段和稳定阶段,垂直织构的样品上,黏着阶段又可被细分为黏着区域分散的阶段和黏着区域成片的阶段。随周次增加,磨屑的演变是由大块的磨屑层经不断被碾碎、氧化,转换成小块的磨屑,并且最终转换成细小的颗粒磨屑,被排出到磨损区域之外。研究结果对认识微动磨损行为中不同周次下表面织构的作用及磨屑的演化具有一定理论意义。

关键词：钛合金微动磨损表面织构磨损过程激光加工磨屑

泡沫镍/环氧树脂/碳化硅双连续复合材料的料浆冲蚀行为研究

在线全文

学校读者我要写书评

暂无评论

摩擦学学报 2017年第1期37卷 44-51页

作者：姜胜利侯思焓刘洋段德莉李曙中国科学院金属研究所中国科学院核用结构材料与安全性评价重点实验室辽宁沈阳110016

设计并制备出一种颗粒增强型双连续三元复合材料--泡沫镍/环氧树脂/碳化硅双连续复合材料,以材料的总损失量为重点研究了其在含氯化钠料浆冲蚀条件下的损伤行为.结果表明:颗粒增强的泡沫镍/环氧树脂/碳化硅双连续三元复合材料的耐料浆... 详细信息

设计并制备出一种颗粒增强型双连续三元复合材料--泡沫镍/环氧树脂/碳化硅双连续复合材料,以材料的总损失量为重点研究了其在含氯化钠料浆冲蚀条件下的损伤行为.结果表明:颗粒增强的泡沫镍/环氧树脂/碳化硅双连续三元复合材料的耐料浆冲蚀性能明显优于环氧树脂/碳化硅二元复合材料;不同孔径泡沫镍骨架的复合材料的冲蚀量随攻角变化出现了不同的峰值;合理匹配泡沫镍骨架的孔径和体密度,可制备出具有优异抗冲蚀性能的颗粒增强双连续复合材料.

关键词：复合材料颗粒增强双连续冲蚀攻角

泡沫镍/环氧树脂/碳化硅双连续相复合材料的拉伸性能

在线全文

学校读者我要写书评

暂无评论

材料研究学报 2016年第12期30卷 909-913页

作者：刘洋段德莉王俊翔侯思焓李曙中国科学院金属研究所沈阳110016

制备不同添加量碳化硅、不同规格泡沫镍增强的环氧树脂双连续复合材料,对其拉伸性能进行了评价。结果表明,泡沫镍的孔径较小、体密度较大时复合材料的拉伸强度高,碳化硅添加量对力学性能的影响较小。根据对拉伸断口和拉伸曲线的观察和分... 详细信息

制备不同添加量碳化硅、不同规格泡沫镍增强的环氧树脂双连续复合材料,对其拉伸性能进行了评价。结果表明,泡沫镍的孔径较小、体密度较大时复合材料的拉伸强度高,碳化硅添加量对力学性能的影响较小。根据对拉伸断口和拉伸曲线的观察和分析,探讨了泡沫镍/环氧树脂/碳化硅双连续复合材料拉伸破坏过程和机制。

关键词：双连续复合材料拉伸性能泡沫镍环氧树脂

稀土对GCr15轴承钢滚动接触疲劳中微点蚀的影响

在线全文

学校读者我要写书评

暂无评论

摩擦学学报 2023年第9期43卷 995-1005页

作者：李林龙吴彼薛伟海高禩洋段德莉李曙中国科学院金属研究所辽宁省航发材料摩擦学重点实验室辽宁沈阳110016

机床轴承的服役性能与各部件间的摩擦学行为紧密相关,微点蚀是轴承发生精度寿命失效时在滚道表面出现的典型损伤.本文中采用球棒试验研究了油润滑时不同接触疲劳循环周次下稀土/普通GCr15轴承钢的滚动摩擦学行为.结果表明:不管是稀土GC... 详细信息

机床轴承的服役性能与各部件间的摩擦学行为紧密相关,微点蚀是轴承发生精度寿命失效时在滚道表面出现的典型损伤.本文中采用球棒试验研究了油润滑时不同接触疲劳循环周次下稀土/普通GCr15轴承钢的滚动摩擦学行为.结果表明:不管是稀土GCr15轴承钢还是普通GCr15轴承钢,微点蚀的数量随着接触疲劳循环周次的增加而增加;不同的是,稀土GCr15轴承钢的微点蚀不仅浅而且较小较圆,普通GCr15轴承钢的微点蚀不仅深而且容易成片出现.开展的轴承台架试验也发现稀土轴承和普通轴承存在同样的微点蚀行为差别.从轴承钢的组织结构和碳化物方面讨论了稀土对微点蚀的影响,添加稀土使GCr15轴承钢中碳化物均匀地分布在基体中,有效地减少了液析碳化物的析出和大量网状碳化物的出现,从而降低了GCr15轴承钢在滚动接触疲劳中微点蚀的产生.

关键词：微点蚀 GCr15轴承钢稀土磨损机制滚动接触疲劳