International Journal of Applied Ceramic Technology
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2022
·Vol. 20
·期 2
·1028-1036
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IF 2.328
Wanjun Li,Wei Ji,Qiqi Zhu,Bowen Fan,Ji Zou,Weimin Wang,Zhengyi Fu
The natural high brittleness of sapphire leads to its poor machinability, which limits its application shape and size. The connection between sapphire and metal provides a new method to prepare large-size sapphire components and complex structural parts. In this study, sapphire and TC4 alloy were joined by spark plasma sintering (SPS) diffusion technology with Al 2 O 3 -Ti as interlayer fillers. The effects of filler composition, sintering temperature, microstructure, and phase distribution on the strength of the joint were explored. The results showed that sapphire and TC4 could be well connected by SPS with Al 2 O 3 -Ti fillers. The microstructure of the joint showed no obvious defect or element enrichment. The optimized shear strength of sapphire/interlayer(Al 2 O 3 -Ti)/TC4 joint reached 121 MPa, and the fracture path mode was sapphire-interlayer-TC4, indicating the strong bonding between the heterogeneous materials. The sapphire/interlayer(Al 2 O 3 -Ti)/TC4 structure could relieve the residual stress caused by the difference in the thermal expansion coefficient in direct connection between sapphire and TC4.
研究领域:
材料科学
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连接技术
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陶瓷-金属复合材料
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先进制造
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DOI
高影响因子
MATERIALS CHARACTERIZATION
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2023
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IF 4.7
Zhaoxin Zhong,Biao Zhang,Yuhan Ren,Jian Ye,Jiawei Zhang,Feng Ye
In this study, bioinspired web-liked multiphase (TiB + TiC+Ti 3 Si)/TC4 composites were successfully constructed by employing the boron-modified polysilazane polymer as a source of B/C/Si. The bioinspired architecture consisted of long TiB nanowires with ultra-high aspect ratios (up to 48.2) acting as ‘web’, and hybrid spheroidal TiC and rod-like Ti 3 Si particles serving as ‘nodes’. The multiphase reinforcements were grown through the unique SLS (solid-liquid-solid) mechanism based on multiple liquid phases at the core-shell TC4@B m PSZ interface. The enhanced strength of bioinspired web-liked composites was attributed to the synergistic load transfer of hybrid reinforcements. Notably, the flexural strength reached up to 1863 MPa with a high crack-initiation toughness (K Ic ) of 17.8 MPa·m 1/2 . The insights gained from this study provided a promising design approach for developing of high-performance TMCs with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
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Nanomaterials
·
2022
·Vol. 12
·期 12
·2086
·
IF 5.719
Yuxin Wang,Jiahuan Chen,Yifan Yang,Zihan Liu,Hao Wang,Zhen He
This study develops the nanostructured superhydrophobic titanium-based materials using a combined preparation method of laser marking step and the subsequent anodizing step. The structural properties were determined using an X-ray diffractometer (XRD) and scanning electron microscope (SEM), while the performance was explored by wear and corrosion tests. The laser marking caused a rough surface with paralleled grooves and protrusions, revealing surface superhydrophobicity after organic modification. The anodizing process further created a titanium oxide (TiO2) nanotube film. Both phase constituent characterization and surface elemental analysis prove the uniform nanofilm. The inert nanosized oxide film offers improved stability and superhydrophobicity. Compared to those samples only with the laser marking process, the TiO2nanotube film enhances the corrosion resistance and mechanical stability of surface superhydrophobicity. The proposed preparation pathway serves as a novel surface engineering technique to attain a nanostructured superhydrophobic surface with other desirable performance on titanium alloys, contributing to their scale-up applications in diverse fields.Keywords:titanium alloy;nanostructure;superhydrophobicity;anodic oxidation
研究领域:
材料科学
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表面工程
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DOI
PubMed
高影响因子
Coatings
·
2026
·Vol. 16
·期 5
·543
·
IF 3.4
Wei Zhang,Baozhen Yang,En Zhu,Feibiao Yu
A three-factor, four-level orthogonal design was employed to optimize the overall forming quality of powder bed fusion with a laser beam (PBF-LB)-fabricated TC4 alloy containing 0.3 wt.% YH2. Sixteen process-parameter combinations were established, and two specimens were fabricated for each combination. Laser power, scanning speed, and hatch spacing were selected as the investigated variables. Relative density, surface roughness, and Vickers hardness were evaluated using the entropy weight method combined with the weighted-sum method. On this basis, the microstructure of the specimens produced under the optimal process parameters was systematically characterized. The results showed that the influence of the investigated factors on overall forming quality followed the order: hatch spacing > laser power > scanning speed. The optimal process parameters were a laser power of 200 W, a scanning speed of 1100 mm/s, and a hatch spacing of 0.10 mm, under which the specimens exhibited superior overall forming quality. The addition of 0.3 wt.% YH2did not significantly alter the dominant phase constitution of the alloy, but promoted α′ martensite refinement and weakened the texture through the in situ formation of Y2O3nano-oxide particles.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2025
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IF 7
Hao Li,Yao Tang,Zhicai Zhang,Chao Wang,Jiakun Wu,Zhiqiang Hou,Yikan Yang,Jiao Yang,Jun Gao,Haikuo Wang
Ti6Al4V (TC4) titanium alloy is often limited by its insufficient strength and inadequate high-temperature oxidation resistance under demanding service conditions. The introduction of ceramic reinforcing phases to form titanium matrix composites (TMCs) presents an effective approach for enhancing its overall performance. In this study, high-pressure and high-temperature (HPHT) processing (5.5 GPa, 1000/1800 °C) was applied to sinter pure TC4 powder and TC4 powder doped with 1 wt% B 4 C, with systematic investigation of their microstructural evolution and properties. The results demonstrate that HPHT treatment significantly improves the density, hardness, and compressive strength of pure TC4. For example, after treatment at 1800 °C, pure TC4 reached a hardness of 471 HV and a compressive strength of 1720 MPa, exceeding the properties of cast TC4 (305 HV, 997 MPa). The TC4–1 wt% B 4 C composite sintered at 1800 °C exhibited even higher hardness (553 HV) and compressive strength (1875 MPa). Importantly, the composite also demonstrated superior electrochemical corrosion resistance and improved oxidation resistance at 700 °C compared to pure TC4. This work confirms that HPHT is an effective technique for fabricating high-performance TMCs, offering a viable strategy for simultaneously enhancing mechanical strength and environmental resistance.
研究领域:
材料科学
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复合材料
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机械工程
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高温材料
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Zhaoxin Zhong,Jian Ye,Yang Wang,Yuhan Ren,Jiawei Zhang,Biao Zhang,Feng Ye
The pressureless sintering (PLS) technique holds substantial potential in manufacturing cost-effective composites with intricate shapes. Nonetheless, it can lead to reduced density in titanium matrix composites (TMCs), affecting their mechanical properties. This study introduces a novel approach to producing high-density TMCs utilizing polymer encapsulation on hydride-dehydride (HDH) TC4 particles through wet mixing. The coexistence of the sintering Si-B-Ti/Al-C-N liquid phases and a dual approach to deoxidizing HDH TC4 particles synergistically enhance the compactness of the TMCs, achieving densities as high as 98.5 % during PLS. The densification mechanisms for (TiB+TiC+Ti 3 Si)/TC4 composites under different conditions kinetics were revealed by calculating the effective grain growth exponent and activation energy. The (TiB+TiC+Ti 3 Si)/TC4 composite, produced through PLS at 1300 ℃ for 1.5 hours, exhibits exceptional properties with a compressive strength of 2087 MPa and a fracture strain of 41.7 %. This research will provide a feasible avenue for developing high-performance TMCs using the polymer as the reinforcement source and low-cost HDH TC4 powder during PLS.
研究领域:
材料科学
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机械工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
·
IF 6.3
Kequn Sun,Yinghui Dong,Lulu Yao,Mausumi Mahapatra,Yufu Xu
In this investigation, the surface tribological behavior of YG8/TC4 contacts under microgel lubrication was explored, utilizing thermal- and pH-sensitive PNIPAM-co-PAA-(IF-MoS 2 /GO) composite microgels as lubricant additives. Through the application of a ball-on-disk reciprocating tribometer, the study demonstrated the outstanding lubrication capabilities of the composite microgels. The lubrication process involving PNIPAM-co-PAA-(IF-MoS 2 /GO) composite microgels initiated a tribo-chemical reaction, leading to the generation of a larger quantity of TiS 2 with exceptional lubricating properties on the friction surface compared to alternative lubrication conditions. The effective isolation of the friction pair by PNIPAM-co-PAA composite microgels contributed to the reduction in tribo-oxidation of the sliding surfaces , while the presence of IF-MoS 2 facilitated the formation of TiS 2 . Furthermore, the facile sliding property of GO nanosheets played a crucial role in achieving overall excellent lubrication performance. The synergistic effects arising from the components in PNIPAM-co-PAA-(IF-MoS 2 /GO) composite microgels introduce a novel and effective strategy for controlling the friction and wear of YG8/TC4 contacts.
研究领域:
材料科学
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表面工程学
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高影响因子
SURFACE & COATINGS TECHNOLOGY
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2026
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IF 6.9
Xiaoyan Guo,Lei Wu,Qiuyan Ye,Yingjie Lv,Nan Wang,Jiaqiao Li,Jiaxu Zhang,Yiku Xu,Yongnan Chen,Yiming Chen
Although micro-arc oxidation (MAO) coatings improve the mechanical properties of titanium alloys, their porous structural defects tend to act as pathways for corrosive agents and as adhesion sites for contaminants. In this study, a superhydrophobic coating was developed on TC-4 titanium alloy by combining in-situ hydrothermal synthesis of ZIF-8 with POTS surface modification, thereby forming a rough surface with low surface energy. The POTS/ZIF-8@MAO composite coating exhibits strong adhesion to the substrate through both physical and chemical bonding. Consequently, it demonstrates excellent chemical and thermal stability, maintaining a water contact angle (WCA) of 156.53° ±2.47° and a sliding angle (SA) of 6.32° ±1.16° even under extreme conditions. Due to its low water adhesion, the coating demonstrates significant self-cleaning ability against both solid and liquid contaminants. Electrochemical analysis reveals that it improves corrosion inhibition by up to 99% compared to pristine MAO-treated titanium alloy, providing an effective protective barrier for the substrate. This work proposes a promising strategy that may potentially expand the application scope of titanium alloys.
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Hui Song,Jinshu Wang,Xinxin Wang,Guangshun Ran,Chunxia Lin,Tianjiao Lou,Jinxu Song,Xing Cheng,Wenyuan Zhou,Hongyi Li
Efficient hydrogen evolution at high current densities requires simultaneous optimization of intrinsic reaction kinetics, multiphase mass transport, and electrode durability. Here, we constructed a binder-free Pt/TiN NTs@3D-TC4 electrode by integrating Pt nanoparticles and in situ-grown TiN nanotube arrays on a three-dimensional printed porous titanium-alloy scaffold. Its high performance arises from three mutually reinforcing effects. First, the work function mismatch between Pt and TiN drives electron transfer from TiN to Pt, producing electron-rich Pt sites and an interfacial built-in electric field. Combined with Pt–N coordination and d - p orbital hybridization, this electronic metal-support interaction optimizes hydrogen adsorption and desorption energetics, thereby enhancing intrinsic hydrogen evolution reaction activity. Second, the periodic macroporous scaffold and nanoparticle-assembled TiN nanotubes create a superhydrophilic and aerophobic multiscale transport network. This network promotes electrolyte infiltration, proton delivery, and rapid bubble detachment while mitigating gas shielding at high current densities. Third, robust Pt–N anchoring and binder-free integration of the catalytic layer with the conductive framework suppress Pt migration, aggregation, and detachment. Consequently, Pt/TiN NTs@3D-TC4 requires overpotentials of only 30.8 and 207 mV to deliver 10 and 1000 mA cm −2 , respectively. It also achieves a Pt mass activity of 20.81 A mg Pt −1 at 200 mV and operates stably for over 200 h at 1 A cm −2 . These results establish a practical electrode design that combines hierarchical transport regulation with interfacial electronic modulation for scalable hydrogen production at high current densities. Interfacial electron transfer optimizes H* adsorption/desorption; multiscale hydrophilic architecture accelerates bubble release and mass transport; Pt–TiN interaction ensures structural stability. The triple enhancement enables scalable, high-current-density water electrolysis. Download: Download high-res image (145KB) Download: Download full-size image
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Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 20
·4169-4177
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IF 6.331
Xiao Zhang,Li Liu,Wan Peng,Xiaohan Dong,Yahui Gu,Zhuangzhuang Ma,Donglin Gan,Pingsheng Liu
Bacteria associated infection is a critical challenge for metallic implants and devices in biomedical applications. Here, we report phosphonate/zwitterionic/quaternary amine terpolymers as a new type of antifouling and bactericidal coating for metallic substrates. Through reversible-addition fragmentation chain transfer polymerization (RAFT) and quaternization, well-controlled phosphonate/zwitterionic/cationic terpolymers with identical phosphonate segments (repeat units of 15) and varied zwitterionic and cationic components (nSBMA : nTMAEMA = 64 : 0, 54 : 18, 18 : 32, 9 : 52, and 0 : 70) were precisely prepared. The polymers can be coated on TC4 substrates based on the strong coordination between phosphonate groups and metallic substrates, as evidenced by water contact angle and XPS tests. Bactericidal evaluation revealed that the antibacterial efficiency was enhanced with the increase of cationic content in the coating polymers. TC4 substrates coated with the polymer coating with a cationic segment of 70 repeat units were able to kill 97.5 and 94.0% of S. aureus and E. coli, respectively. By virtue of the antifouling ability of the zwitterionic component and the bactericidal ability of the cationic component, the antibacterial efficiency was increased to 99.5% without significant compromising of the cytocompatibility. Meanwhile, the dual functional terpolymers could be easily applied on other metallic substrates, such as titanium, stainless steel, and Ni/Cr alloy, which were able to kill up to 97.9% of S. aureus and 99.9% of E. coli, respectively, endowing the excellent antibacterial properties to general bio-metals. The high-efficiency antibacterial modification strategy demonstrated here may find many applications on metallic implants and devices to combat bacterial associated infections.
研究领域:
材料科学
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生物医学工程
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高分子化学
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微生物学
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PubMed
高影响因子
WEAR
·
2021
·
IF 3.892
Qi Liu,Yang Liu,Xing Li,Guangneng Dong
In order to improve the surface tribological properties of TC4 titanium alloy , this paper used laser processing technology to prepare a cell-like texture on TC4 surface. The cells of cell-like texture were separated by regular cracks caused by recasting of TC4, which could be got at the parameters of 1 μm distance of adjacent laser spots and 2.5 μm patch of adjacent laser paths with a certain laser power density . The laser treatment increased the surface microhardness from 351 to 445 HV. The relationship between tribological properties of TC4 and the laser power density was studied. At 0.32 GW/cm 2 , under the lubricant of simulated body fluid (SBF), the average friction coefficient between TC4 and UHMWPE reduced significantly by 32.4%, and the wear rate of UHMWPE ball decreased by 59%, compared with the original surface. The cell-like texture could increase the transmission speed of the lubricant at the friction interface by three times with the help of capillary force , and it could also store lubricant in the texture to improve the tribological performance . The channels around cells were assumed to be rectangular groove. The width of the channel which was observed with a 3D confocal microscope was 3.2 μm, and the capillary force produced by a single rectangular groove was calculated.
研究领域:
材料科学
·
表面工程
·
摩擦学
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DOI
高影响因子
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