CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuhong Cui,Baoluo He,Shenghua Xue,Zhuo Chen,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
Improving the tribological performance of water via designing nanomaterials as lubricant additive has garnered mounting interest. In this work, the poly-(N-isopropylacrylamide) microgel is grafted onto Fe 3 O 4 nanoparticles surface (Fe 3 O 4 @PNA) via free radical polymerization. Then, the Fe 3 O 4 @PNA can self-anchored on the MXene nanosheets via hydrogen bonding interaction to obtain MXene@Fe 3 O 4 @PNA composite. The as-prepared MXene@Fe 3 O 4 @PNA can effectively reduce friction and wear when used as a water-based lubricant additive. Compared with pure water, the average coefficient of friction (COF) and wear volume decrease by 61% and 78.7%, respectively. The lubrication mechanism was analyzed by focused ion beam technique-TEM (FIB-TEM) and X-ray photoelectron spectroscopy (XPS). The outstanding tribological performance of MXene@Fe 3 O 4 @PNA is attributed to the synergistic lubrication effect of MXene and Fe 3 O 4 @PNA. Interlayer shear of MXene and spherical Fe 3 O 4 @PNA can make MXene@Fe 3 O 4 @PNA play a full role of sliding friction and rolling friction mechanism, which can induce tribo-chemical reactions to form a protective film on the contact area of the friction pair. In addition, the hydrophilic groups of the MXene@Fe 3 O 4 @PNA can adsorb a large number of water molecules and form a hydration layer, reducing the agglomeration of nanosheets and acting as a boundary lubrication film. Moreover, the as-prepared MXene@Fe 3 O 4 @PNA exhibit excellent photothermal conversion performance in both underwater environment and dry state. Based on this characteristic, infrared light can be collected efficiently and stored quickly. Then, convert and utilize it. Therefore, the multifunctional MXene@Fe 3 O 4 @PNA has a broad application prospect as a water-based intelligent lubrication additive.
研究领域:
材料科学
·
纳米技术
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2022
·
IF 4.804
Jiakun Wu,Haikuo Wang,Zhicai Zhang,Chao Wang,Zhiqiang Hou,Shun Wan,Dazhuan Wu,Xiaoping Ouyang
WC-cBN-MoS 2 self-lubricating ceramics were synthesized by using high pressure and high temperature sintering method. An analytical model of the self-lubricating properties has been developed to reveal the interrelationship between mechanical and self-lubricating properties. The influence of mechanical and self-lubricating properties of ceramics on the wear rate were analyzed. Self-lubricating performance optimization criterion are proposed accordingly. It was found that MoC, WS 2 can be formed during sintering, which can ensure self-lubricating and low temperature sintering properties. Adhesive wear is the main wear mechanism, the extent of which varies with the content of self-lubricating components. The high modulus of elasticity is the main reason for the excellent self-lubricating and mechanical properties of composites. The well-sintered WC-cBN-MoS 2 bulks present an excellent self-lubricating property with a hardness of 26.3 GPa and fracture toughness of 10.5 MPa·m 1/2 , which is improved at least by 52% and 46% respectively compared with the traditional self-lubricating ceramics.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xuelu Wei,Laishi Li,Feng Liu,Limin Fan,Yusheng Wu
Ti 2 GaC is a novel ternary layered ceramic with unique physical and chemical properties such as excellent thermal conductivity , low density, high-temperature oxidation resistance , and corrosion resistance . However, the relatively low strength and hardness of Ti 2 GaC hinder its practical applications as a structural component. To strengthen the mechanical properties of Ti 2 GaC and extend its application range, in this study, (Ti 1-x V x ) 2 GaC MAX phase solid solutions with x ranging up to 0.25 were successfully synthesized using a two-step sintering method. (Ti 1-x V x ) 2 GaC solid solutions grains showed a typical lamellar structure , where the a lattice constant of (Ti 1-x V x ) 2 GaC decreased from 3.0660 to 3.0326 Å and c decreased from 13.3223 to 13.1520 Å. The effects of V content on the solid solution microstructure, crystal structure, mechanical strength, and resistance to friction and wear were evaluated in detail. In addition, the solid solution formation mechanism and fracture damage modes of these materials were discussed. The crystal structure, mechanical properties, electronic properties, and chemical bonding of (Ti 1-x V x ) 2 GaC continuous solid solution at x = 0–1 were calculated by DFT. The solid solution enhancement mechanism of (Ti 1-x V x ) 2 GaC was explained by analyzing the relationship between the structure and properties.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zhongpan Zhang,Xiaoqiang Fan,Xiaoliang Ma,Minhao Zhu
To unify the lubrication characteristics of carbon spheres (CS) with high load-bearing capacity and molybdenum disulfide (MoS 2 ) with exceptional low-shear friction performance, CS wrapped with MoS 2 (C@MoS 2 ) were accomplished via an efficient and facile hydrothermal method based on the self-assembly principle. Then, 0.5 wt% C@MoS 2 particles were dispersed into Poly Alpha Olefin 40 (PAO 40) for enhancing the anti-friction/wear abilities. Subsequently, 0.5 wt% of C@MoS 2 particles were dispersed into Poly Alpha Olefin 40 (PAO 40) to enhance its anti-friction and wear-resistant capabilities. The excellent tribological properties of C@MoS 2 particles were attributed to the synergistic lubrication between bearing and filling effect of CS as well as the superior antifriction capacity of MoS 2 shell. Furthermore, the synergetic lubrication mechanism of C@MoS 2 may be segmented into different stages: I. the shell crushing stage, corresponding to the rolling bearing effect of C@MoS 2 particles at the friction interface; II. the core/shell separation stage, corresponding to the rolling bearing effect and self-repair effect of C@MoS 2 particles; III. the core/shell recombination stage, corresponding to the construction and reinforcement of protective film and the great improvement of anti-friction/wear abilities performance.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Friction
·
2024
·Vol. 12
·期 8
·1716-1727
·
IF 6.3
Meng Yan,Wen Xiangli,Cheng Jie,Bai Pengpeng,Meng Yonggang,Tian Yu
Most studies of liquid lubricants were carried out at temperatures below 200 °C. However, the service temperature of lubricants for aerospace and aeroengine has reached above 300 °C. In order to investigate the friction mechanism and provide data for high temperature lubrication, the friction and wear properties of chlorophenyl silicone oil (CPSO)-lubricated M50 steel and Si 3 N 4 friction pairs were investigated herein. Ball-on-disk experimental results show that the lubrication performance of CPSO varies significantly with temperature. Below 150 °C, coefficient of friction (COF) remains at 0.13–0.15 after the short running-in stage (600 s), while the COF in the running-in stage is 0.2–0.3. At 200 °C and above, the running-in time is much longer (1,200 s), and the initial instantaneous maximum COF can reach 0.5. Under this condition, the COF gradually decreases and finally stabilizes at around 0.16–0.17 afterwards. This phenomenon is mainly due to the different thickness of boundary adsorption film. More importantly, the wear rate of M50 steel increases significantly with the temperature, while the wear rate barely changes at temperatures above 200 °C. The anti-wear mechanism is explained as tribochemical reactions are more likely to occur between CPSO and steel surface with the increased temperature, generating the FeCl 2 protective film on the metal surface. Accordingly, FeCl 2 tribochemical film improves the lubrication and anti-wear capacity of the system. At high temperatures (200–350 °C), FeCl 2 film becomes thicker, and the contact region pressure becomes lower due to the larger wear scar size, so the wear rate growth of M50 steel is much smaller compared with that of low temperatures (22–150 °C). The main findings in this study demonstrate that CPSO lubricant has good anti-wear and lubrication capacity, which is capable of working under temperatures up to 350 °C.
研究领域:
材料科学
·
摩擦学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2021
·
IF 8.947
Xian Tong,Quanxiang Sun,Dechuang Zhang,Kun Wang,Yilong Dai,Zimu Shi,Yuncang Li,Matthew Dargusch,Shengbin Huang,Jianfeng Ma,Cuie Wen,Jixing Lin
β -type titanium (Ti) alloys have been extensively investigated as orthopedic implant materials due to their unique combination of low elastic modulus , high specific strength , corrosion resistance , and biocompatibility. In this study the mechanical properties , corrosion behavior, friction and wear performance, and cytotoxicity of β -type Ti–24Nb–38Zr–2Mo (TNZM) and Ti–24Nb–38Zr–2Mo–0.1Sc (TNZMS) have been comparatively investigated for orthopedic applications. Cold-rolling (CR) and cold-rolling plus solution-treatment (CR+ST) were performed on the as-cast (AC) alloys and their microstructures and material properties were characterized. The impact of Sc addition on the mechanical and corrosion properties, friction and wear behavior, and in vitro cytocompatibility of the TNZMS alloy was assessed. The CR+ST TNZMS alloy exhibited the best combination of properties among all the alloy samples, with a yield strength of 780 MPa, ultimate strength of 809 MPa, elongation of 19%, Young's modulus of 65.4 GPa, and hardness of 265 HV. Electrochemical testing in Hanks’ Solution indicated that the CR+ST TNZMS sample also showed the highest corrosion resistance with a corrosion potential of -0.234 V, corrosion current density of 0.07 µA/cm 2 , and corrosion rate of 1.2 µm/y. Friction and wear testing revealed that the TNZMS alloy showed higher wear resistance compared to the TNZM alloy and the wear resistance of the different samples was ranked CR > CR+ST > AC. Finally, both the CR+ST TNZM and TNZMS showed no-cytotoxicity towards MG-63 cells and the TNZMS exhibited slightly higher cytocompatibility than the TNZM alloy. Statement of significance This work reports the β -type Ti–24Nb–38Zr–2Mo (TNZM) and Ti–24Nb–38Zr–2Mo–0.1Sc (TNZMS) alloys fabricated by as-cast (AC), cold-rolling (CR), and cold-rolling plus solution-treatment (CR+ST) for potential orthopedic applications. The experimental results showed that the TNZMS alloy exhibited significantly enhanced mechanical, wear, and corrosion properties than those of TNZM alloy; and the CR+ST TNZMS possess a unique combination of the best mechanical and corrosion properties including a yield strength of 780 MPa, ultimate strength of 809 MPa, elongation of 19%, Young's modulus of 65.4 GPa, and corrosion rate of 1.2 µm/y in Hanks’ Solution. Both the CR+ST TNZM and TNZMS alloys exhibited non-cytotoxicity towards MG-63 cells and TNZMS showed a higher cytocompatibility than that of TNZM.
研究领域:
材料科学
·
生物医学工程
·
冶金学
✓ 已验证
DOI
高影响因子
Friction
·
2024
·
IF 6.3
Xiong Liangliang,Wu Mengxue,Fan Xiaoqiang,Zhu Minhao
The bonded MoS 2 solid lubricant coating is an effective measure to mitigate the fretting wear of AISI 1045 steel. In this work, the amino functionalized MoS 2 was protonated with acetic acid to make the MoS 2 positively charged. The directional arrangement of protonated MoS 2 in the coating was achieved by electrophoretic deposition under the electric field force. The bonded directionally aligned MoS 2 solid lubricant coating showed high adaptability to various loads and excellent lubrication performance under all three working conditions. At a load of 10 N, the friction coefficient and wear volume of the coating with 5 wt% protonated MoS 2 decreased by 20.0% and 37.2% compared to the pure epoxy coating, respectively, and by 0.07% and 16.8% than the randomly arranged MoS 2 sample, respectively. The remarkable lubricating properties of MoS 2 with directional alignment were attributed to its effective load-bearing and mechanical support, barrier effect on longitudinal extension of cracks, and the formation of a continuous and uniform transfer film.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2024
·
IF 0.7
Shuang Lv,Fushuan Xu,Changjiang Yang,Lei Zhou,Youcheng Yu,Kefeng Ye
In this paper, MWCNTs-GN hybrid reinforcement was prepared by wet ball milling process. The MWCNTs-GN/Al composites were prepared by high-energy ball milling and vacuum hot-pressure sintering. The MWCNTs-GN hybrid reinforcements and MWCNTs-GN/Al composites were characterised by SEM and TEM, and the synergistic effects of carbon nanotubes and graphene on the mechanical properties of the aluminium matrix composites were investigated by hardness and friction wear tests. The results show that the 0.5 wt.% MWCNTs-GN/Al composite has the best mechanical properties, with a hardness of 116.3 MPa which is 33.9% higher than that of pure aluminium, and the frictional properties of the MWCNTs-GN reinforced aluminium matrix composites have a lower coefficient of friction than that of pure aluminium. After the addition of more than 5 wt.% of the composite reinforcing phase, the wear rate increased slightly due to the reduced densities of the MWCNTs-GN/Al composites.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoqiang Fan,Xiaofeng Wei,Yushan He,Zhuang Zhao,Kaiyue Lin,Minhao Zhu
A crucial prerequisite for obtaining high performance interface lubrication is to regulate the composition and structure of thickener for grease, confronting fatal friction and loss issues in significant equipment manufacturing industrial clusters. Here, a structural defect-mediated transplantation of l -cysteine onto MoS 2 nanosheets was outlined, utilizing mechanical stress induction and mercaptan chemical guidance technology to fully exploit the S vacancies and active Mo atom conjugation. A new MoS 2 functionalized lithium complex thickener (CLT/MoS 2 ) was constructed with eutectic hydrogen-bond thickening system. DFT calculation confirmed that MoS 2 -NH 2 reacted with the carboxyl located at dodecyl stearic acid via dehydration condensation. The regulated-grease using CLT/MoS 2 as thickener in synthetic oil significantly reduced the friction and wear, owing to the formation of complex hydrogen-bond thickening network and induced transition of lubrication state as well as the formation of MoS 2 -based tribo-chemical films. This research introduces a novel approach to the creation of high-performance grease by deploying functional thickener to weaken the wear hazards.
研究领域:
材料科学
·
界面润滑
·
机械工程
✓ 已验证
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Yushi Yang,Xiaoqiang Fan,Zhaofan Yue,Minhao Zhu
Heterogeneous materials are an ideal platform for low friction, but most of the heterogeneous materials used in tribology field are artificially synthesized. Here, by matching the molybdenum disulfide (MoS 2 ) hybrid polyethylene glycol (PEG 200) and diamond-like carbon (DLC) film, the spontaneous formation of heterogeneous transfer film was realized during sliding. Thus, the anti-friction/wear ability of the synergetic system is improved from the reduction of friction coefficient and wear rate by 33.3% and 32.1% contrast to DLC film, severally. The characterization results show that the heterogeneous transfer film is formed by the rehybridization and recrystallization of MoS 2 and DLC combined with amorphous phase. The improvement on shearing capacity and bearing capacity of as-designed lubrication strategy better explicates the solid-liquid synergistic effect. The formation theory of heterojunction in solid-liquid composite lubrication is put forward, which has important reference value for the future solid-liquid composite lubrication technology.
研究领域:
材料科学
·
润滑工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Renhui Zhang,Xue Yang,Jibin Pu,Zhongyi He,Liping Xiong
We first fabricate MoS 2 nano-ball in isopropanol using sonication-assisted method. We systematically probe the lubrication mechanism of MoS 2 nano-ball in isopropanol. Hydroxylated MoS 2 nano-ball could effectively reduce the contact area for GCr15 steel balls and possess superior load-capacity and make the tribosystem achieve ultra-low friction and wear under 98 or 196 N and 600 rpm. For comparison, the lubricity of tribosystem sliding in isopropanol is conducted. Interestingly, graphene layers are formed sliding under 196 N and 600 rpm, the graphene-based transfer film on GCr15 steel ball makes the lubrication condition fast transfer from mixed lubrication condition to full film lubrication condition, which results in high friction and wear. The formation mechanism of graphene is discussed and proposed in details.
研究领域:
材料科学
·
摩擦学
·
化学工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Li Zhu,Yidi Xu,Siwen Liu,Huanhuan Chen,Jiyi Tao,Xian Tong,Yuncang Li,Shengbin Huang,Jixing Lin,Cuie Wen,Jianfeng Ma
Zirconia-toughened alumina (ZTA) ceramic has potential dental restoration and repair applications due to its high mechanical strength , toughness, wear resistance, chemical durability, and biocompatibility. Nevertheless, there is a great deal of crack initiation caused by stress accumulation and also material wastage after computer-aided design/computer-aided manufacturing of ZTA ceramics in conventional clinical processing. In this study, we prepared a ZTA green compact using Stereolithography (SLA) technology followed by sintering at high temperatures ranging between 1450 °C and 1650 °C. The microstructures, mechanical properties , friction and wear performance, and cytotoxicity of the ZTA ceramic were investigated. The results indicate that all ZTA samples were composed of α-Al 2 O 3 , m-ZrO 2 , and t-ZrO 2 phases before and after sintering. With increasing sintering temperatures from 1450 °C to 1650 °C, the density, mechanical properties, hardness, and wear performance of the ZTA samples were gradually improved. The ZTA sample sintered at 1650 °C with a relative density of 96.65% showed the best mechanical performance, with a flexural strength of 572.0 MPa, a Vickers hardness of 16.2 GPa, and a fracture toughness of 7.4 MPa m 1/2 . The sintered ZTA sample exhibited a good cell viability toward MC3T3-E1 cells.
研究领域:
材料科学
·
牙科医学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）