EFFECT OF DIAMOND INTERLAYER ON THE TRIBOLOGICAL PROPERTIES OF TiAlN FILM SLIDING AGAINST CARBON STEEL
EFFECT OF DIAMOND INTERLAYER ON THE TRIBOLOGICAL PROPERTIES OF TiAlN FILM SLIDING AGAINST CARBON STEEL
复制标题
金刚石夹层对TiAlN薄膜与碳钢滑动摩擦性能的影响
DOI：
10.1142/s0218625x1950001x
复制
发表时间：
2018-08-01
影响因子：
1.1
通讯作者：
Sun, F. H.
中科院分区：
文献类型：
--
作者：
Lei, X. L.;He, Y.;Sun, F. H.
通过对硬质合金（WC-Co）-钢、TiAlN-钢、微晶金刚石（MCD）-钢、TiAlN/MCD-钢、微晶金刚石（MCD）-钢微米和纳米晶体金刚石（MNCD）-钢和TiAlN/MNCD-钢接触对。结果表明，与TiAlN单层膜相比，TiAlN/MCD双层膜的COF值提高了57%，而TiAlN/MNCD多层膜的COF值却下降了54%，这是由于MCD和MNCD中间层表面金刚石颗粒形貌的差异以及TiAlN层厚度较小的复制效应造成的。与TiAlN单层相比，TiAlN/MCD和TiAlN/MNCD多层膜的磨损较轻，金刚石中间层为TiAlN顶层提供了强有力的载荷支撑，使TiAlN/MCD和TiAlN/MNCD多层膜的磨损机制由磨粒磨损转变为粘着磨损。此外，MCD和MNCD中间层上较软的TiAlN顶层由于其良好的自润滑性能，可有效提高元素氧和钢球磨屑的储存能力，并加速表面化学反应，在接触区形成较光滑连续的离子金属氧化物摩擦膜。在所有讨论的硬质涂层中，当与中碳钢滑动时，TiAlN/MNCD涂层显示出最低的COF和轻微的磨损，由于下面的MNCD层的强大的负载支撑能力以及顶部TiAlN层的良好的自润滑和摩擦膜形成能力，这显示出在碳钢加工中的广泛应用潜力。
In this study, the effect of diamond interlayer on the tribological properties of titanium aluminum nitride (TiAlN) film sliding against medium carbon steel is investigated in dry rotary friction tests, by evaluating the coefficients of friction (COFs), wear rates, worn surfaces and element transitions of the contacted surfaces in the cemented carbide (WC-Co)-steel, TiAlN-steel, microcrystalline diamond (MCD)-steel, TiAlN/MCD-steel, micro- and nano-crystalline diamond (MNCD)-steel and TiAlN/MNCD-steel contacting pairs. It is found that compared with the TiAlN monolayer, the TiAlN/MCD bilayer film shows 57% higher COF, while the COF of TiAlN/MNCD multilayer inversely drops as much as 54%, due to the distinguished surface diamond grain morphologies of the MCD and MNCD interlayers as well as the copied effect of the TiAlN layer with relatively small thickness. Meanwhile, the diamond interlayer can provide robust load support for the top TiAlN layer, induce the wear mechanism transform from the abrasive wear to adhesive wear, and result in the mild wear of TiAlN/MCD and TiAlN/MNCD multilayers compared to the TiAlN monolayer. Moreover, the softer TiAlN top layer on MCD and MNCD interlayers can effectively improve the storage capacity of element oxygen and worn steel ball debris as well as accelerating the surface chemical reactions to form a smoother continuous ionic metal oxides tribofilm in the contacted zones due to its good self-lubricating property. Among all the hard coatings discussed when sliding against medium carbon steel, the TiAlN/MNCD coating shows the lowest COF and mild wear, due to the robust load support capacity of the beneath MNCD layer as well as the good self-lubricated and tribofilm formation capacity of the top TiAlN layer, which shows broad application potential in carbon steel machining.