JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 6
·5526-5535
·
IF 2.195
Yang Fan,Hu Bo,Peng Ye,Hang Chunjin,Chen Hongtao,Lee Changwoo,Wei Jun,Li Mingyu
A silver (Ag) composite paste was fabricated based on Ag nanoparticles (NPs) and Ag microflakes (MFs). Robust interconnections were achieved after sintering in the temperature range of 150–225 °C. The shear strengths of the Ag MF + NP joints before and after thermal shock from − 50 to 150 °C for 1000 cycles were 155.7 ± 14.5 MPa and 78.4 ± 20.8 Mpa, respectively. The results show that the Ag composite paste not only has similar sintering properties to the Ag NP pastes but also exhibited superior mechanical reliability due to the addition of the Ag MFs. In addition, the sintered properties of different Ag pastes were discussed in terms of the coating organics, thermal behaviour and microstructure. The fracture modes after the shearing tests were analysed in detail. The Ag composite paste provides a potential solution for high-temperature applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Duanmei Song,Beikai Zhang,Hongbiao Du,Jing Wu,Jiadong Yu,Jinhui Li
The global boom in electric vehicles has led to an alarming accumulation of lithium-ion battery waste. Battery recycling technologies have primarily focused on cathode metal recovery, while the contaminated anode graphite has been severely neglected. Conventional graphite recovery methods require multiple acid washes or prolonged high-temperature treatment and consume large amounts of energy and chemicals. Here, we develop an ultra-fast carbon thermal shock and water leaching (CTSW) method, which can transiently realize the complete stripping of anode materials, enable 100% recovery of graphite and copper foil, and recover valuable lithium resources. Specifically, carbon thermal shock (CTS) introducing auxiliary media (CaCO3, Al2O3, etc.) promotes lithium aggregation from the interior to the surface of graphite, converts insoluble LiF to Li2CO3, achieves deep leaching of >99.5% lithium, and immobilizes the hazardous byproduct, HF, to metal fluoride. Compared to conventional hydrometallurgy, LCA analysis shows that our CTSW method has a significantly lower environmental impact, energy, and cost.
研究领域:
材料科学
·
环境工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Peng Sun,Xixun Shen,Pei Xu,Wei Huang,Qunjie Xu
At present, the electroless copper is widely used to achieve the hole conductivity in printed circuit boards (PCBs), but this process contains carcinogenic formaldehyde and uses the precious metals for activation. Here, the conductive polyaniline as a seed layer of PCB is attempted to achieve the hole metallization. The polyaniline is formed on the hole through an in-situ oxidation polymerization method. The formation process of polyaniline was analyzed by SEM, FTIR, and XPS and an uniform polyaniline film with spherical cluster is revealed. The deposition behavior of copper on the polyaniline layer is analyzed by the LSV and Tafel where the deposition potential of Cu is about −0.18 V. The filling tests showed that the copper super-filling can be achieved on the polyaniline layer and the filling time is about 150 min and 90 min for the blind hole with a depth to width ratio of 0.75 and of 0.67, respectively. Thermal shock experiments showed that the copper layer on the polyaniline has good adhesion. These results demonstrate that the polyaniline can serve as an effective seed layer instead of the electroless copper to achieve the hole metallization, which provides a new solution for exploring friendly hole metallization processes for PCB.
研究领域:
材料科学
·
电子工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION AND FLAME
·
2024
·
IF 5.8
Hong-Yu Zhang,Zhe Shi,Ya-Yu Dong,Xu-Wen Wang,Kai-Feng Lin,De-Bin Xia,Jian Zhang,Yu-Lin Yang
The combustion agglomeration of aluminum (Al) and the long heat and mass transfer distance between Al and oxidizer cause serious two-phase flow loss and slag accumulation in the engine of solid propellants. Here, we present an effective strategy by in-situ encapsulating graded nano-aluminum (nAl) and micron-aluminum (μAl) in ammonium perchlorate (AP) simultaneously by using hydroxymethyl cellulose (HMC) as adhesive and constructing a compact coupling fuel oxidizer complex high-energy microsphere (μAl/nAl@AP/HMC) to enhance the energy release efficiency and combustion efficiency. Compared with physical mixture (PM), the ignition delay time and combustion time of μAl/nAl@AP/HMC microspheres are reduced by 69.58 % and 69.87 %, owing to the decomposition process control of AP through the adsorption and spatial constraint effect on the interface between metal fuels and oxidizer. Furthermore, the nAl embedded in the AP surface forms a hot spot around the μAl to promote the combustion reaction, thereby shortening the cavitation threshold and tensile limit time of μAl and accelerating the occurrence of microexplosion. Microexplosion effect in μAl/nAl@AP/HMC microsphere significantly weakens combustion agglomeration and improves combustion efficiency and energy release efficiency by sharp shrinkage of combustion condensation products, which addresses the challenges on energy output and combustion efficiency in high-density solid propellants.
研究领域:
材料科学
·
燃烧学
·
推进剂工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Peifan Qin,Deqi Yi,Jianwei Hao
To investigate thermal shock properties of melamine cyanurate (MCA) for molybdenum disulfide (MoS 2 ) exfoliation, the MoS 2 -MCA superlattice is prepared through self-assembly of pristine MoS 2 , cyanuric acid (CA) and melamine (MA) in water solution. The prepared MoS 2 -MCA is heated in tubular furnace with controlled temperature to obtain two-dimensional (2D)-MoS 2 precursor. Their morphologies are characterized by using Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The obtained 2D-MoS 2 precursor shows a high specific surface area at 336.90 m 2 /g due to bi-layer MoS 2 . TEM and atomic force microscope (AFM) images of 2D-MoS 2 N-methyl-2-pyrrolidone (NMP) solution further confirm the bi-layer MoS 2 exfoliation. The above results prove that MCA is a good thermal shock agent for MoS 2 exfoliation. And the prepared 2D-MoS 2 precursor could also be a good solid reservoir.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Shaojie Mo,Ang Xu,Mo Li,Zhongyang Zheng,Youwei Yan,Xinyun Wang,Heping Li
Hydrogen embrittlement in metals seriously threatens the safe and durable operation of hydrogen energy. Developing efficient and robust hydrogen barriers is a viable solution to solve this issue but remains a significant challenge. An amorphous (ErAlCrZrTi)O high-entropy nanofilm is successfully fabricated via sol-gel on steel and identified as highly efficient and robust hydrogen barrier. At 270 nm thickness, the nanofilm achieves ultra-low hydrogen permeability of 1.35 × 10 −15 mol m −1 s −1 Pa −0.5 , enhancing hydrogen resistance by 2738 times at 500 °C compared with that of bare steel. Compared to Er 2 O 3 , Al 2 O 3 , Cr 2 O 3 , and ZrO 2 , it improves hydrogen resistance by 5, 11, 26, and 90 times, respectively. Moreover, such a high hydrogen resistance can be satisfyingly retained even after the (ErAlCrZrTi)O nanofilm suffering 10 dpa irradiation. The nanofilm exhibits 37 MPa bonding strength and exceptional thermal shock resistance, attributed to the formation of Cr₂O₃ transition layer via precipitation and oxidation of Cr from the substrate during annealing. It strengthens adhesion and alleviates thermal expansion mismatch with the substrate. The mechanism for the high barrier efficiency is further revealed by this theoretical calculations. These results provide tremendous insights on the understanding and future design of high-performance hydrogen barriers for hydrogen embrittlement prevention.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Xinyue Wang,Zhoudong Yang,Boya Wang,Wei Chen,Guoqi Zhang,Jing Zhang,Jiajie Fan,Pan Liu
Power modules applied in offshore applications are facing risks of corrosion failures on die-attach materials due to high humidity and H 2 S exposure. To investigate such corrosion behavior for sintered die-attach materials, we conducted a study with four groups of samples fabricated using copper and silver metal particles under different solvent systems. Such samples were firstly subjected to high-humidity-H 2 S conditions for 168 h to simulate the harsh offshore environment. After undergoing corrosion, the primary compounds formed were CuO/Cu 2 O and Ag 2 S through SEM, XRD, and XPS analysis. Notably, the incorporation of epoxy resin into sintered copper joints resulted in a remarkable reduction in corrosion and a substantial improvement in electrical conductivity after the reaction. In contrast, while the addition of epoxy did not evidently reduce corrosion in silver joints, it did lead to a significant increase in shear strength. Furthermore, to gain further insights into the effect of epoxy resin on corrosion behavior, electrochemical analysis, and molecular dynamics simulations were conducted. Finally, the mechanical reliability of the corroded copper and silver joints was evaluated through thermal shock tests. In summary, sintered copper joints exhibited better anti-corrosion behaviors than sintered silver under high humidity and H 2 S exposure, especially with the addition of epoxy resin. However, the corrosion products of sintered copper suffered from a sharp decrease in shear strength after thermal shock tests than sintered silver, which is probably due to the coefficient of thermal expansion mismatch.
研究领域:
材料科学
·
电化学
·
模拟与仿真
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Pai Huang,Binglin Zou,Yongqiu Zhang,Xiaodong Niu,Ying Wang
Rare earth (RE) silicates are promising candidates for thermal barrier coating (TBC) materials. In this work, RE silicate thermal barrier coating materials Y x Yb 2-x SiO 5 were prepared by solid state reaction at high temperature. The RE silicate samples were used for the TBCs on the titanium alloy (TC4) by atmospheric plasma spraying (APS). The thermal shock resistance of RE silicate coatings deposited on TC4 substrate was tested by water quenching, and compared with that of traditional yttria-stabilized zirconia (YSZ) coating. The thermodynamic tests show that RE silicate has lower thermal conductivity, uniform thermal expansion coefficient (TEC). Thermal shock resistance life of Y 0.4 Yb 1.6 SiO 5 sample is almost 20% higher than traditional materials. The prepared RE silicate TBC materials (Y x Yb 2-x SiO 5 ) exhibit great potential for application in thermal protection of titanium alloys.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Anzhe Wang,Ping Hu,Cheng Fang,Dongyang Zhang,Xinghong Zhang
The effects of cooling rate and initial temperature on thermal shock behavior of ZrB 2 -SiC ceramic were studied by water spraying method with a thermocouple real-time temperature acquisition technique for the first time. It was shown that the cooling rate could be adjusted by changing the water flow rate, and the fracture behavior strongly depended on both the cooling rate and initial temperature. When the extreme value of cooling rate was constant, the decrease of initial temperature would lead to the increase of thermal stress, accompanied by a more serious damage of material, which was mainly because of the nonlinear relationship between thermal expansion coefficient and temperature.
研究领域:
材料科学
·
工程热物理
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 70
·65533-65540
·
IF 3.289
Hongxing Dong,Yonghe Li,Jin Zhang,Lijia Liu,Liying Cao,Pingjian Ming,Wenjing Liu,Chunhong Zhang,Lianhe Liu,Hao Wei
In order to reduce the effect of the thermal shock that occurs during the curing process of epoxy resin (EP), and to improve the mechanical properties of the cured EP, a novel curing procedure for an epoxy resin system, sodium carboxymethyl cellulose (CMC)/E51 type epoxy resin (E51)/4,4-diamino diphenyl methane (DDM), was established according to the simulated results of a three-dimensional finite element model and extrapolation method. Compared to the conventional curing procedure, a cooling stage was used in the new procedure according to the simulated results to reduce the effect of the thermal shock. The experimental verification showed that even when the curing time was 30 min shorter than the conventional procedure, the new curing procedure clearly improved the mechanical properties of the cured resin. For instance, the bending strength of the specimen cured by the new procedure reached 136 MPa, which is increased by 46% when compared to the specimen cured by the conventional procedure (93.3 MPa) and the impact strength increased from 18.3 kJ m−2 to 23.1 kJ m−2.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Qiaoyu Meng,Keqiang Zhang,Shuo Yang,Rujie He,Zhaoliang Qu
Thermal shock resistance is critical to ensure the service safety of ceramic hot-end components. The thermal shock performance of stereolithographic additive-manufactured ceramics has not yet been studied. In this study, a series of thermal shock experiments with various temperature differences was conducted on stereolithographic additive-manufactured Al 2 O 3 ceramics. The surface cracks were analysed based on photographs captured before and after the thermal shock experiments. Three-point bending tests with in situ X-ray digital radiography were conducted to determine the thermal shock resistance. Crack initiation, propagation, and coalescence were observed under flexural loads. The critical temperature difference of the stereolithographic additive-manufactured Al 2 O 3 ceramics was determined to be 267.22 °C. The crack length increased and residual strength decreased with increasing temperature differences. The layered structure of the stereolithographic additive-manufactured ceramics slowed crack propagation . We expect that this study will serve as a reference for the performance of stereolithographic additive-manufactured Al 2 O 3 ceramics in extreme environments.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2023
·
IF 3.1
Yan Chao,Cui Xiufang,Jing Yongzhi,Chen Zhuo,Wang Rui,Fang Yongchao,Jin Guo,Liu Erbao
In this work, rare-earth elements Eu and Y were added to La 2 Zr 2 O 7 (LZ) as doping elements, and the ceramic coating of (La 0.5 Eu 0.25 Y 0.25 ) 2 Zr 2 O 7 (LEYZ) was prepared. The evolution of the sintering resistance, thermal shock resistance, and thermal insulation properties of the multi-element rare-earth co-doped modified coatings under long-term and high-temperature conditions was studied. The results showed that the sintering resistance of the doped coating was significantly improved, and the coating still does not fall off after 200 h at 1100 °C. The thermal shock life of the coating at 1000 °C is increased by 47% compared with that of the undoped modified LZ coating. The length of the vertical cracks in LEYZ ceramic layer is obviously shorter than that in LZ coating, which will be more beneficial to preventing the coating from peeling off. Compared with LZ coating, the insulation temperature of the LEYZ ceramic coating is increased by 24, 26 and 34% in the range of 900 ~ 1100 °C, respectively. The coating has the best thermal insulation effect, which is consistent with theoretical calculation results. The results demonstrate that the modified lanthanum zirconate coatings doped with Europium and Yttrium has great potential in high-temperature performance.
研究领域:
材料科学
·
陶瓷工程
✓ 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）