TiN/TiAlN涂层金属陶瓷的摩擦学性能研究

采用多弧离子镀技术在Ti(C,N)基金属陶瓷基体上沉积了TiN/TiAlN多层涂层,通过对不同速度、载荷下的微量摩擦磨损试验前后涂层金属陶瓷的显微形貌、组织、成分、相结构及粗糙度的观察分析,研究了涂层金属陶瓷的摩擦学性能.结果表明,TiN/TiAlN涂层金属陶瓷的平均摩擦系数均低于金属陶瓷基体本身的平均摩擦系数;在相同载荷下,滑动速度较低时,涂层金属陶瓷磨损表面粘着严重,有GCr15掉下的大块粘着物,随着滑动速度的增大,由严重粘着对磨偶件材料向少量粘着变化,其平均摩擦系数增大.在相同的滑动速度下,载荷较大时,TiN/TiAlN涂层金属陶瓷的平均摩擦系数较大.TiN/TiAlN涂层金属陶瓷的磨损机制主要是粘着磨损和磨粒磨损.     

电弧离子镀TiAlN和TiAlSiN涂层的高温摩擦磨损行为

采用电弧离子镀技术在高速钢和单晶硅上沉积TiAlN和TiAlSiN涂层,利用高温摩擦磨损试验机考察两种涂层在常温、400℃和600℃下的摩擦磨损行为。通过光学轮廓仪观察涂层磨损后三维形貌和二维磨痕轮廓曲线,利用扫描电子显微镜(SEM)和能谱仪(EDS)分析磨痕、摩擦副的微观形貌以及元素分布,研究Si元素的加入对TiAlN涂层高温摩擦磨损性能的影响。结果表明:TiAlN、TiAlSiN涂层在600℃摩擦稳定后的摩擦因数最低,其次是在400℃,常温下的摩擦因数最高;TiAlN涂层在常温下摩擦完后已经磨穿失效,而TiAlSiN涂层在600℃摩擦完后才失效。粘着磨损和氧化磨损主要存在于TiAlN涂层摩擦过程中,TiAlSiN涂层常温下主要磨损形式为磨粒磨损、粘着磨损以及塑性变形导致的鱼鳞状裂纹,400℃下为粘着磨损和氧化磨损,600℃下为磨粒磨损、粘着磨损和氧化磨损。     

盾构滚刀材料表面镍基碳化钨涂层摩擦学性能研究

目的 盾构滚刀磨损是盾构施工中最常见的问题之一,为减缓刀具的剧烈磨损、延长刀具的使用寿命,采用等离子堆焊工艺在盾构滚刀表面制备镍基碳化钨涂层以强化滚刀性能,基于盾构滚刀服役的真实工况,研究滚刀涂层的摩擦学性能及其合理的评价方式.方法 对镍基碳化钨涂层在往复滑动、冲滑复合(冲击+滑动)两种相对运动模式下进行摩擦磨损试验研究.结果 制备镍基碳化钨涂层后可提高滚刀的耐磨性.往复滑动磨损后,镍基碳化钨涂层的磨痕宽度为0.42 mm,而H13钢的磨痕宽度达到0.78 mm,镍基碳化钨涂层的抗冲滑性能也明显优于H13钢.两种相对运动模式下镍基碳化钨涂层均主要承受磨粒磨损,但往复滑动模式下涂层存在局部剥落,而冲滑复合模式下则伴随一定的粘着磨损.结论在两种相对运动模式下,镍基碳化钨涂层表面的高硬度碳化钨颗粒都可阻止磨粒对较软镍基合金区域的切削与碰撞.相较往复滑动模式,冲滑复合模式下镍基碳化钨涂层要承受冲击和滑动的耦合作用,涂层的磨痕特征以及损伤形式都有明显的不同.采用冲滑复合运动模式的摩擦磨损试验能对盾构滚刀刀圈的摩擦学性能进行更全面、合理的研究及评价.     

多弧离子镀制备TiAlCN和TiAlN涂层的结构和摩擦磨损性能

目的 对比研究TiAlCN和TiAlN涂层的结构、塑韧性、结合力和摩擦磨损性能.方法 采用多弧离子镀技术制备了TiAlCN和TiAlN涂层.利用扫描电镜(SEM)、X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)研究了涂层的微观形貌、元素和物相组成.通过纳米压痕、纳米划痕、划痕测试仪和摩擦磨损实验研究了涂层的硬度、...     

双辉等离子渗钽对TiAlN/Ta复合涂层结构和性能的影响

采用Ta层作为过渡层,通过双辉等离子渗金属（DGPSA）与射频磁控溅射（RFMS）辅助直流脉冲磁控溅射技术（DCPMS）制备TiAlN/Ta复合涂层。借助掠入射XRD、SEM、AFM、纳米压痕、划痕以及摩擦磨损测试了不同工艺制备的Ta过渡层对复合涂层的相结构、表面（截面）形貌、硬度、结合力、韧性和摩擦磨损性能的影响。结果表明,TiAlN复合涂层在高偏压作用下结构致密,RFMS技术制备的Ta过渡层为柱状晶结构,复合涂层表面粗糙度较小,硬度较大而磨损稳定性和耐磨性较差;而DGPSA技术制备的Ta过渡层为纳米晶结构,复合涂层表面粗糙度较大,硬度降低但磨损稳定性与耐磨性都增强。对比发现,通过DGPSA技术制备Ta过渡层使得TiAlN/Ta复合涂层的结合力与韧性大幅度提高。     

电火花间隔沉积石墨-硬质合金自润滑涂层及其摩擦学性能

目的 提高机械零部件表面的润滑性能.方法 以45钢为基体,采用电火花沉积技术在表面上间隔沉积出条状的石墨与硬质合金涂层条,用HSR-2M型高速往复摩擦磨损试验机对所制备的条状涂层进行相关的摩擦磨损试验,使用SEM和EDS并对涂层的表面形貌、截面形貌以及组成成分进行研究,分析了不同因素对石墨-硬质合金自润滑涂层摩擦磨损性能的影响规律及磨损机理.结果 涂层表面致密,且厚度均匀,在与对偶件摩擦时表现出良好的自润滑性能及耐磨性能.随着硬质合金涂层所占面积比从10％上升到40％时,涂层的润滑性能会降低,耐磨性提高,但随着往复摩擦频率的增加,接触表面温度升高,变形阻力下降,自润滑性能有所提升.当往复摩擦频率为500次/min时,摩擦因数最小.结论 石墨-硬质合金自润滑涂层的耐磨性和润滑性能与硬质合金在涂层区域中所占面积比及往复摩擦频率有关.主要是因为往复摩擦频率的增加会使磨粒的刻划作用增强,而硬质合金所占面积比会使涂层的硬度、耐磨性增加,涂层的主要磨损形式表现为磨粒磨损.     

沉积时间和靶电流比例对磁控溅射TiAlN涂层耐磨性的影响研究

采用磁控溅射工艺在WC-8Co硬质合金基体表面制备了一层厚度分别为2.5μm、3μm和3.5μm的TiAlN涂层,并制备了不同Ti、Al比例的TiAlN涂层,利用摩擦磨损机考察了涂层的承载能力和摩擦学性能,通过扫描电子显微镜观察了磨损试件的表面形貌,通过摩擦系数和显微组织的演变来评价不同成分和不同厚度TiAlN涂层的摩擦学性能。结果表明,随着涂层厚度的增加,涂层的摩擦系数降低,涂层更不易被磨穿,表明在一定范围内增加涂层厚度有利于提高涂层的耐磨损性能;涂层的成分发生改变时,由于Ti、Al元素的共同作用,呈现不同的摩擦性能,当TiAl比例为50：50时,涂层的耐磨性最好。     

沉积时间和靶电流比例对磁控溅射TiAlN涂层耐磨性的影响（英文）

采用磁控溅射工艺在WC-8Co硬质合金基体表面制备了一层厚度分别为2.5、3和3.5μm的TiAlN涂层,并制备了不同Ti、Al比例的TiAlN涂层,利用摩擦磨损机考察了涂层的承载能力和摩擦学性能,通过扫描电子显微镜观察了磨损试件的表面形貌,通过摩擦系数和显微组织的演变来评价不同成分和不同厚度TiAlN涂层的摩擦学性能。结果表明,随着涂层厚度的增加,涂层的摩擦系数降低,涂层更不易被磨穿,表明在一定范围内增加涂层厚度有利于提高涂层的耐磨损性能;涂层的成分发生改变时,由于Ti、Al元素的共同作用,呈现不同的摩擦性能,当Ti/Al比为50:50时,涂层的耐磨性最好。     

等离子喷涂层与微弧氧化膜层的摩擦磨损性能比较

采用等离子喷涂法在钛合金基体上制备了纳米氧化锆陶瓷涂层,采用微弧氧化法在锆合金基体上制备了氧化锆陶瓷膜层。通过摩擦磨损试验研究了纳米陶瓷涂层和微弧氧化膜层的摩擦磨损性能。结果表明:在往复滑动磨损条件下和两种载荷水平下,两种涂层均呈现相同的耐磨性规律;在较大载荷下,微弧氧化膜层的磨痕深度较大,即纳米ZrO2陶瓷涂层的耐磨性优于微弧氧化陶瓷膜层。     

TA19合金表面TiAlN硬质涂层的耐磨性能研究

为了提高TA19合金的摩擦学性能,采用磁控溅射技术在TA19合金表面制备了TiAlN硬质涂层。采用扫描电子显微镜、X射线衍射仪和能谱仪研究了TiAlN涂层的微观形貌、物相组成和成分含量及分布,利用球-盘摩擦磨损试验机研究了不同载荷条件下硬质涂层和基体的摩擦行为及其磨损机理。结果表明:TiAlN涂层厚度约为4μm,表面为细小颗粒状,颗粒间较为紧密,颗粒尺寸大小均匀。涂层表面主要由Ti、Al、N元素组成,其原子比大约为1∶1∶1,涂层和基体间结合力可达到53.3 N。磨损试验结果表明,在TA19合金表面制备TiAlN涂层后,其摩擦系数和磨损率较TA19合金基体的有了明显的降低。在低载荷下,TiAlN涂层的磨损形式主要是磨粒磨损,在高载荷时转化为磨粒磨损和氧化磨损。     

Evaluation offing surfaces with several coatings for friction, wear and scuffing life

Friction and wear of the sliding components in an automobile cause an increase in both fuel consumption and emission. Many engine components involved with sliding contact are all susceptible to scuffing failure at some points during their operating period. Therefore, it is important to evaluate the effects of various surface coatings on the tribological characteristics of the piston ring and cylinder block surface of a diesel engine. Wear and scuffing tests were conducted using a friction and wear measurement of the piston ring and cylinder block in a low friction diesel engine. The frictional forces, wear amounts and cycles to scuffing in the boundary lubricated sliding condition were measured using the reciprocating wear tester. The tester used a piece of the cylinder block as the reciprocating specimen and a segment of the piston ring material as the fixed pin. Several coatings on the ring specimen were used, such as DLC, TiN, Cr-ceramic and TiAlN, in order to improve the tribological characteristics of the ring. The coefficients of friction were monitored during the tests, and the wear volumes of the piston ring surfaces with various coatings were compared. Test results show that the DLC coating exhibits better tribological properties than the other coatings. The graphite structure of this coating is responsible for the low friction and wear of the DLC film. The TiN and DLC coatings show better scuffing resistance than the other coatings. The TiN and Cr-ceramic coated rings show good wear resistance and high friction.     

FeNiBSiCe喷熔层微动磨损特性

利用氧-乙炔火焰喷熔方法在45号钢表面制取了FeNiBSiCe喷熔层,在SRV球盘摩擦磨损试验机上研究了FeNiBSiCe合金的摩擦磨损行为,用扫描电子显微镜(SEM)、场发射扫描电镜(FEGSEM)和能量色散谱仪(EDS)等技术分析了喷熔层的表面、截面及磨损面形貌.结果表明,FeNiBSiCe喷熔层的耐磨性优于SAE52100钢,喷熔层磨损率随滑动速度增加,先快速降低,随后趋于缓慢,最后上升.摩擦系数随滑动速度的增大而增加,然后趋于稳定.磨损机理是低载荷下为微观切削和疲劳脱层,在相对高载荷下和滑动速度较高时产生显微裂纹,且在涂层表面形成了一层氧化物磨屑层,缓解了微动磨损.     

Friction and wear properties of TiN,TiAlN, AlTiN and CrAlN PVD nitride coatings

Four nitride coatings, TiN, TiAlN, AlTiN and CrAlN were deposited on YG6 (WC + 6 wt.% Co) cemented carbide by cathodic arc-evaporation technique. The friction and wear properties were investigated and compared using ball-on-disc method at high speed with SiC ball as a counter material. The tests were evaluated by scanning electron microscopy, X-ray diffractometer, energy dispersive X-ray, micro hardness tester and an optical profilometer. The results showed that TiN and TiAlN coatings presented lower friction coefficient and lower wear rate, and that high Al content AlTiN and CrAlN coatings didn't present better anti-wear properties in this test. Oxidation and abrasive wear were the main wear mechanism of TiN coating. In spite of the observation of micro-grooves and partial fractures, TiAlN possessed perfect tribological properties compared with the other coatings. High Al content increased the chemical reactivity and aroused severe adhesive wear of AlTiN coating. CrAlN coating presented better properties of anti-spalling and anti-adhesion, but abundant accumulated debris accelerated wear of the coating under this enclosed wear environment.     

Sliding wear characteristics of solid lubricant coating on titanium alloy surface modified by laser texturing and ternary hard coatings

Titanium alloys are poor in wear resistance and it is not suitable under sliding conditions even with lubrication because of its severe adhesive wear tendency. The surface modifications through texturing and surface coating were used to enhance the surface properties of the titanium alloy substrate. Hard and wear resistant coatings such as TiAlN and AlCrN were applied over textured titanium alloy surfaces with chromium as interlayer. To improve the friction and wear resisting performance of hard coatings further, solid lubricant, molybdenum disulphide (MoS2), was deposited on dimples made over hard coatings. Unidirectional sliding wear tests were performed with pin on disc contact geometry, to evaluate the tribological performance of coated substrates. The tests were performed under three different normal loads for a period of 40 min at sliding velocity of 2 m/s. The tribological behaviours of multi-layer coatings such as coating structure, friction coefficient and specific wear rate were investigated and analyzed. The lower friction coefficient of approximately 0.1 was found at the early sliding stage, which reduces the material transfer and increases the wear life. Although, the friction coefficient increased to high values after MoS₂ coating was partially removed, substrate was still protected against wear by underlying hard composite layer.     

在甘油润滑下TiAlN涂层的超低摩擦和磨损特性∗

TiAlN 涂层具有优异的力学性能,在刀具领域具有广泛的应用背景,然而优化制备参数以获得性能更为优异的 TiAlN 涂层仍需要做进一步的研究,同时与 TiAlN 涂层相适应的绿色润滑剂也是当前亟待解决的问题之一。 基于磁控溅射技术,研究 Al 靶溅射电流对 TiAlN 涂层结构和力学性能的影响,考察甘油润滑下 TiAlN 涂层的摩擦学性能,并利用 X 射线光电子能谱探究甘油的润滑机理。 结果表明:当溅射电流为 3 A 时得到的 TiAlN-3A 涂层具有最致密的晶状结构及最优的力学性能。 在甘油润滑下,TiAlN-3A 涂层的摩擦因数仅为 0. 007,其磨损率为 2. 62×10^-6 mm3N^-1m^-1 。 XPS 分析表明,甘油在钢球与 TiAlN 涂层相对滑动过程中发生摩擦降解反应,在表面上生成新的产物 FeOOH。 FeOOH 的亲水性使得在接触区域表面吸附甘油分子及甘油降解产物形成流体润滑层,可提供优异的减摩和耐磨性能。     

Tribological properties of MoSi2–MoS2 coatings coupling with SAE 52100 steel under reciprocating sliding

Tribological properties of MoSi₂–MoS₂ coatings coupling with SAE52100 steel were tested under reciprocating sliding. Effects of normal load, sliding speed and MoS₂ content on the coatings tribological properties were studied. Worn surfaces of the coatings were analyzed by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The friction coefficient of the coatings was approximately 0.45 and a little lower than that of the monolithic MoSi_2. The friction did not vary with the sliding time, sliding speed and load. Coating with 12 wt.% MoS₂ had the lowest friction. Wear rate of the coatings increased with the sliding speed and normal load and was higher than that of the monolithic MoSi₂. Wear rate of the coatings did not vary with MoS₂ content. Worn surface of the coatings and the coupling steel ball was covered by a SiO₂ and MoO₃ wear debris layer. Wear mechanism of the coatings was microfracture.     

The corrosion and wear behavior of TiN and TiAlN coated AISI 316 L stainless steel

In this study, TiN and TiAlN coatings were deposited on AISI 316 L stainless steel substrates by PVD techniques. The composition and crystalline structure of the as-deposited coatings were analyzed by energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD) methods, respectively. The corrosion resistance studies of TiN-coated and TiAlN-coated samples were carried out in 0.9 wt % NaCl and SBF solutions using the electrochemical potentiodynamic polarization method and the wear behavior was evaluated with the ball-on-disk wear method at a sliding speed rate of 0.3 m/s under 2.5 N load in a dry medium. It was found that both TiN and TiAlN coatings exhibited relatively good corrosion resistance, however, TiAlN coatings showed a better corrosion resistance than TiN coatings. The TiAlN coating contributes positively against corrosion and wear behavior by increasing the surface hardness and by decreasing the friction coefficient of AISI 316 L stainless steel, respectively.     

Wear and Friction Properties of Electrodeposited Ni-Based Coatings Subject to Nano-enhanced Lubricant and Composite Coating

This paper presents research findings on the tribological performance of electrodeposited coatings subject to nano-lubricants with the addition of nano-Al_2O_3 and graphene and Ni/nano-Al_2O_3 composite coatings. Electrodeposited coatings were produced by using a pulse electrodeposition method. Tribological experiments were conducted by using a linear reciprocating ball on flat sliding tribometer. Experimental results confirmed that the wear and friction resistance properties were significantly enhanced by doping of nano-effects in the lubricating oil and composite coating. The addition of Al_2O_3 nanoparticles in the lubricating oil showed the best tribological properties, followed by Ni–Al_2O_3 composite coatings and nano-oil with graphene. The surface morphology and microstructure of electrodeposited coatings were examined by scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. The wear mechanisms of these coatings subjected to tribological testing were investigated by post-test surface analyses. This research provides a novel approach to design durable nano-coatings for tribological applications in various industries such as automotive,aerospace, locomotive and renewable energy technologies.     

添加Y对电弧离子镀TiAlN薄膜结构和摩擦磨损性能的影响

目的 为进一步提高电弧离子镀TiAlN薄膜的摩擦磨损性能,研究添加元素Y对CrNi3MoVA钢表面电弧离子镀TiAlN薄膜微观组织结构、硬度、弹性模量及摩擦磨损性能的影响。方法 采用Ti-50Al和Ti-49Al-2Y合金靶,利用电弧离子镀技术在CrNi3MoVA钢表面制备两种氮化物薄膜,利用纳米压痕仪和摩擦磨损试验机分别测试了两种薄膜的硬度、弹性模量和摩擦系数,并用SEM、TEM、EDS、GIXRD分析了两种薄膜磨损前后的形貌、成分、相结构。结果 添加Y降低了TiAlN薄膜的晶粒尺寸,使其由柱状晶结构转变为近似等轴晶结构。TiAlYN薄膜的硬度较TiAlN薄膜提高了约25%,其弹性模量与TiAlN薄膜相近。与Si3N4对磨时,在加载载荷为20 N、往复行程为10 mm、往复速率为400 r/min的条件下,TiAlN薄膜的稳定摩擦系数为0.70~0.75,而TiAlYN薄膜的稳定摩擦系数为0.60~0.65,TiAlYN薄膜的磨损率较TiAlN薄膜的磨损率减小了约47%。TiAlN薄膜与TiAlYN薄膜的主要磨损机制均为刮擦磨损,TiAlN薄膜的失效机制主要是脆性裂纹导致的剥落。结论 添加Y对TiAlN薄膜具有明显的减摩耐磨作用,并提高了TiAlN薄膜在摩擦磨损过程中的抗开裂和抗剥落性能。     

超音速火焰喷涂Fe基非晶合金涂层材料的摩擦磨损性能研究

目的通过优化涂层制备工艺,制备致密的Fe基非晶合金涂层,以提高非晶合金涂层的耐磨性。方法采用活性燃烧高速燃气超音速火焰喷涂(AC-HVAF)技术,通过工艺优化,制备了组织致密的Fe基非晶合金涂层。利用场发射扫描电子显微镜、X射线衍射仪、维氏显微硬度计、摩擦磨损试验机、三维光学轮廓仪等设备,对非晶合金涂层的组织结构、摩擦性能和磨损机制进行了深入分析。结果 Fe基非晶合金涂层呈现典型的非晶结构,涂层厚度在300μm左右,涂层的平均显微硬度值高达1000HV0.1。在干摩擦试验条件下,Fe基非晶合金涂层的磨损量远低于304不锈钢材料,磨损率是304不锈钢基体的1/3~1/2。Fe基非晶合金涂层的磨损机制以疲劳磨损为主,伴随着氧化磨损。氧化磨损主要是由干摩擦过程中产生的摩擦热导致,氧化磨损加速了片层剥落。结论 Fe基非晶合金涂层孔隙率的降低和非晶相含量的提高,有利于稳定摩擦系数和改善涂层的耐磨损性能。