DIAMOND AND RELATED MATERIALS
·
2020
·
IF 2.65
Xiao-yu Zhang,Min Xu,Sheng-zhu Cao,Wen-bo Chen,Wen-yao Yang,Qin-yu Yang
Diamond/copper composite has been considered as one of the next generation thermal management materials. Interfacial modification is an essential means of ameliorating interface wettability and bonding of diamond/copper composite for improving its thermal conductivity . In the present work, Diamond/copper composite was manufactured by using spark plasma sintering (SPS) technology with 60% volume fraction of diamond mixed with 40% volume fraction of copper power, chromium powder (0.7 wt%) and scandium oxide powder (0.21 wt%). A series of material analysis methods were used to characterize the microstructure, interfacial layer , phase compositions and distributions of Diamond/copper composite. The total and partial electron density of states (DOS) for Diamond-Cr-Sc 2 O 3 interfacial model was investigated by means of first-principles calculations from CASTEP modules. The results showed Sc 2 O 3 made a 5–20 nm well-arranged and uniformly distributed interfacial chromium carbide layer in the interface region, which played a critical role in increasing the amount of reactive interfacial bonding and decreasing defect. The addition of Sc 2 O 3 brought the increasing number of heat transfer carriers at the interface and made the interface energy system more stable. The obtained diamond/copper composite exhibited that the wettability between diamond particles and copper was effectively improved. The thermal conductivity of diamond/copper is 872 W/(m·K) and the possible reasons for doping rare-earths Sc 2 O 3 to improve the thermal conductivity were discussed.
研究领域:
材料科学
·
复合材料工程
·
界面科学
·
热管理材料
·
粉末冶金
·
计算材料学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 10
·105099
·
IF 1.449
Cao Wang,Ming Li,Zhe Zhao
Commercial α-Al2O3 and Y2O3 powders with 0.5 wt% TEOS were used to fabricate transparent polycrystalline YAG ceramics by reactive spark plasma sintering. The powder mixtures were dispersed with dispersants of PAA and citric acid in aqueous slurry. YAG specimens sintered at 1400 °C for 3 min were used to investigate the effect of processing parameters on the microstructure and the optical properties. It is found that a pretreatment of the powders mixture with 0.6 wt% citric acid can significantly improve the microstructure homogeneity of the as-sintered YAG ceramics. After post-annealing in wet air, the specimen sintered from the treated powders mixture was transparent, while the specimen from the untreated powders mixture was hazy. The effects of citric acid for this were investigated in this paper.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Shengtai Zhang,Zhen Teng,Linzhen Wu,Chen Chen,Yongqiang Tan,Xiaosong Zhou
Spark plasma sintering (SPS) is a fast and efficient method for preparing functional ceramics . This article investigates the phase evolution, thermal expansion and chemical stability of traditional (Y 1.2 Nd 1.8 Fe 5 O 12 ) and high-entropy ((Y, Gd, Sm, Eu, Dy) 3 Fe 5 O 12 ) garnet ceramics. Prepared under conventional SPS (50 MPa) conditions at 900–1100 °C. The results indicate that using SPS sintering method can significantly reduce the sintering temperature (1100 °C) and time (3 min) of garnet ceramics. (Y, Gd, Sm, Eu, Dy) 3 Fe 5 O 12 (1.6 × 10 −6 K −1 ) exhibits superior thermal expansion stability compared to Y 1.2 Nd 1.8 Fe 5 O 12 (5.4 × 10 −6 K −1 ). The strong REE-O bond energy and severe lattice distortion of high entropy garnet ceramics hinder the migration and diffusion of cations, resulting in higher leaching resistance of high-entropy garnet ceramics (∼10 −7 g m −2 d −1 -10 −8 g m −2 d −1 ) compared to traditional garnet ceramics (∼10 −5 g m −2 d −1 -10 −6 g m −2 d −1 ). Therefore, SPS has broad application prospects in the low-temperature preparation of high-entropy garnet ceramics for immobilization of actinide elements.
研究领域:
材料科学
·
陶瓷工程
·
核废料处理
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 22
·期 11
·2087-2093
·
IF 2.119
Yang F.,Yu Z.,Meng B.,Zhu Y. J.,Yang Q. Q.,Lin Z. L.,Zhou H. M.,Liang X. L.
The Sr 1 − x
Na
x
SiO 3 − x /2 samples (SNS, x = 0.2, 0.3, 0.4, 0.45) were prepared by spark plasma sintering (SPS) at a lower sintering temperature of 850 °C for a shorter holding time of 5 min. All SNS samples by SPS are composed of single monoclinic SrSiO 3 phase, and the grain sizes are in the range of 1.9 ± 0.5 μm. The measurement results of the electrical properties show that the conductivities of SPS samples are one order of magnitude higher than those of the samples by traditional sintering method. The ion transference numbers of SNS samples by SPS are all higher than 0.99 in the temperature range of 500∼650 °C, which demonstrates that the SNS has met the requirements as solid oxide fuel cell electrolytes and the SPS process is a promising candidate for preparations of SNS electrolytes.
研究领域:
材料科学
·
陶瓷
·
固态离子学
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Liang Liu,Rui Bao,Jianhong Yi,Dong Fang
Mono-dispersed and homogeneous carbon nanotube (CNT)/copper (Cu) composite powders were fabricated by spraying pyrolysis (SP) method successfully. Subsequently, CNT/Cu composites were obtained by spark plasma sintering (SPS) at sintering temperature ranged from 1023 to 1223 K (70–90% melting point of pure Cu). The mechanical properties , micro-morphology and interface microstructure of CNT/Cu composites were measured and characterized. The results reveal that Cu nano-particles (NPs) coated on the CNT surface are conducive to improving the wettability of CNT within matrix and reducing the interface energy between matrix and CNT, and finally stable interface structure is established. The traditional trade-off tendency between strength and ductility is balanced in the CNT/Cu composites, which are sintered at 1223 K. The ultimate tensile strength (UTS) shows 344 MPa and the elongation is 19.6%, which owing to the improvement of CNT–Cu interface bonding. At last, the role of interfacial bonding extent played in determining the load transfer efficiency of CNT is discussed.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2026
·
IF 4.9
Wenda Hua,Bin Zhu,Wenge Guan,Wenjie Huang,Xinye Lian,Yangxiaozhi Zha,Yuqin Zhang,Zengdong Meng
Developing bone scaffolds with biomimetic architecture and bioactive signaling is essential for effective orthopedic repair. In this study, 16.6 wt% MgO incorporated hydroxyapatite (MgO/HA) scaffolds with a Gyroid Triply Periodic Minimal Surface (TPMS) architecture were fabricated using a multi-stage route combining Digital Light Processing (DLP) 3D printing and Spark Plasma Sintering (SPS). The resulting scaffolds maintained ∼60% porosity and exhibited an increase in compressive strength (7.27 MPa) compared to HA (4.24 MPa). The incorporation of MgO led to an increase in the degradation rate, facilitating the sustained release of bioactive Mg²⁺ ions. In vitro biological evaluations demonstrated a potent multi-lineage cellular response: the scaffolds enhanced rat mesenchymal stem cell (rMSC) proliferation and upregulated key osteogenic markers (RUNX2, ALP, and OCN), while simultaneously stimulating human umbilical vein endothelial cells (HUVECs) by significantly upregulating angiogenic gene expressions (VEGF and Ang-1). These results indicate that the combination of MgO doping and TPMS architecture successfully establishes a robust osteogenesis-angiogenesis coupling effect alongside optimized mechanical performance, providing a highly promising candidate platform for patient-specific bone tissue engineering.
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2025
·
IF 2.3
Yang Xiao-Hui,Wang Kai-Fei,Zhang Guo-Hua
A novel method for fabricating W 2 B 5− x -based ceramics was developed using in situ SPS of W and B 4 C mixed powders with various molar ratios (1.6:1, 1.8:1, and 2:1). The results revealed a primary reaction between W and B 4 C yielding W 2 B 5− x and graphite, alongside a minor residual B 4 C phase. All compositions achieved near-full densification, featuring a uniform microstructure composed of coarse B 4 C grains and fine graphite particles dispersed within the boride matrix. Quantitative phase analysis indicated that increasing the W/B 4 C molar ratio led to a progressive increase of the W 2 B 5− x phase and a slight increase of graphite but a marked decrease of the residual B 4 C. Mechanically, Vickers hardness declined from 15.63 GPa ± 0.40 GPa to 14.28 GPa ± 0.34 GPa (under a 30 kg load) as the W/B 4 C ratio increased, attributable to the diminished content of high-hardness B 4 C and the grain coarsening of the W 2 B 5− x . The flexural strength exhibited a similar downward trend, with a maximum value of 620.4 MPa ± 45.4 MPa achieved at a W/B 4 C ratio of 1.6. Remarkably, fracture toughness improved from 7.94 MPa·m 1/2 ± 0.04 MPa·m 1/2 to 9.21 MPa·m 1/2 ± 0.08 MPa·m 1/2 , primarily because of graphite-induced toughening mechanisms such as crack deflection, branching, and bridging.
研究领域:
材料科学
·
陶瓷
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Xiyang Liu,Lihua Guo,Jinpeng Zhang,Guoqiang Wang,Linyuan Lu,Jun Lin,Jinwei Zhan
Tungsten (W) stands out as one of the most promising matrix materials for cermet fuels in nuclear thermal propulsion (NTP) systems, with its effective thermal conductivity (ETC) being intricately linked to the economic viability and safety of reactors. This study investigated the influence of sintering temperature on the microstructure of nanoscale W powder using Spark Plasma Sintering (SPS). Based on the microstructural evolution observed at various temperatures, both a finite element (FE) model and an Artificial Neural Network (ANN) model were employed to assess the ETC of the W matrix, and the ETC was experimentally measured using the frequency-domain thermoreflectance (FDTR) method. The FE simulation results reveal a 7.5 % average relative error between modeled and measured ETC values at high sintering temperatures, demonstrating good consistency between simulation and experiment. Further analysis reveals that the porosity of the W matrix significantly affects its ETC. As the sintering temperature increases from 1273 to 1973 K, the porosity decreases from 32.48 % to 3.86 %, while the ETC increases from 46.07 to 160.71 W/(m·K). The ANN results demonstrate that the trained ANN model could accurately assess the ETC of the W matrix, with a regression coefficient of 0.9983 for the trained dataset and 0.9922 for the tested dataset. Based on the relationship between porosity and ETC, an optimized formula has been developed for predicting the ETC of the W matrix with an R² value of 0.9954 and an RRMSE of 2.37 %. The ANN model established in this study provides an accurate method for predicting the ETC of W and offers new insights and references for predicting the ETC of other materials.
研究领域:
材料科学
·
核工程
·
机器学习
·
热分析
·
微观结构建模
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Qiao Ding,Yuhang Liu,Ning Li,Bo Wu,Qing Cheng,Qi Zhao,Tong Liu,Rui Wang,Deyu Li
Dye-containing acid sulfate copper plating baths frequently suffer from severe dull deposits in the low-current-density (LCD) region due to the overpowering synergistic inhibition of polyether suppressors and dyes. To address this challenge, we developed a novel nicotinic acid-modified imidazole–epichlorohydrin complex (IEN1.5) designed to uniquely preserve the activity of the bis(3-sulfopropyl) disulfide (SPS) accelerator. Through a combination of electrochemical analyses, macroscopic plating tests, and DFT/MD simulations, we demonstrate that IEN1.5 physically interacts with SPS via specific non-covalent bonds rather than acting as a standalone, competing brightener. This original molecular strategy successfully breaks the severe LCD suppression, significantly enhancing deposit brightness and strengthening the Cu(111) crystallographic texture. Crucially, by preventing the detrimental over-coordination to Cu⁺ intermediates, IEN1.5 achieves unprecedented bath stability, reducing apparent SPS consumption to a mere 0.9% over 100 cyclic voltammetric stripping (CVS) cycles. These findings provide a highly original and robust mechanistic framework for designing stable, high-efficiency additive systems in advanced copper electrodeposition.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Nana Zhu,Lu Zhu,Baojing Zhang,Peizhong Feng,Shiheng Li,Philipp V. Kiryukhantsev-Korneev,Evgeny A. Levashov,Xuanru Ren,Xiaohong Wang
An innovative two-step approach of self-propagating high-temperature synthesis (SHS) and spark plasma sintering (SPS) was developed to rapidly fabricate MoSi 2 and Mo(Al,Si) 2 ceramics for high-temperature anti-oxidation applications. The SHS process predominantly promoted the synthesis of high-purity and high-yield MoSi 2 and Mo(Si,Al) 2 phases in the alloyed powders. Subsequently, dense and crack-free MoSi 2 and Mo(Al,Si) 2 ceramics were produced using SPS. 1500 °C oxidation tests of the ceramics (100 h) revealed the formation of a protective SiO 2 oxide layer on the surface of MoSi 2 ceramics, while an Al-Si-O composite glassy oxide layer formed on Mo(Si,Al) 2 ceramics, which exhibited better thermal stability and lower oxygen permeability compared to the single SiO 2 oxide layer. However, an excessive Al content (>0.05 at.%) compromised the oxidation resistance due to the emergence of a Si-depleted Mo 5 (Si,Al) 3 layer with inferior oxidation resistance, which was caused by the high-temperature diffusion of Si. Therefore, via this novel two-step SHS-SPS technique compact and crack-free Mo(Si,Al) 2 ceramics can be rapidly synthesized at high temperatures. When trace amount of Al was added (0.05 at.%), Mo(Si 0.95 Al 0.05 ) 2 showed optimum high-temperature oxidation resistance.
研究领域:
材料科学
·
高温结构材料
✓ 已验证
DOI
高影响因子
VACUUM
·
2018
·
IF 2.067
Ruifeng Liu,Wenxian Wang,Hongsheng Chen,Minbo Tan,Yuyang Zhang
With the advantage of micro-size and nano-size B 4 C particles, micro-/nano-bimodal size B 4 C particles have been widely used to fabricate excellent composites with high strength and ductility. In this study, micro-/nano-bimodal size B 4 C particles reinforced aluminum matrix composites with three different volume fractions (3%, 5% and 7%) were fabricated by spark plasma sintering (SPS) followed by hot extrusion and rolling (HER). The microstructure evolution and mechanical properties of as-SPSed, as-extruded and as-rolled composites were investigated. Results show that the microscopic electrical discharge between the particles in SPS promotes the densification of composites. The maximum relative density of as-SPSed composites increases from 99.21% to 99.65% after HER. Nano-size B 4 C particles distribute mainly at the gap of 6061Al particles in as-SPSed composites, while the microstructure presents more homogeneous after HER. Pin effect of nano-size B 4 C particles stimulates dynamic recrystallization (DRX) and grain refining. Texture orientation of the 6061Al grain exists in the as-extruded and as-rolled B 4 C/6061Al NCs. No new phases are detected in composites in all deformation stages. The tensile strength of as-SPSed composites increases when compared with 6061Al matrix, and the tensile strength of as-rolled composites after hot extrusion is enhanced to 305 MPa. Fracture mechanisms of as-extruded and as-rolled composites mainly include 6061Al matrix tear, particle/matrix interfacial tear and micro-size B 4 C particle fracture.
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
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Yu Zhang,Tengjie Li,Yuanfang Liu,Xiaoyan Li,Chunmei Zhang,Zhaozhong Feng,Xue Peng,Zongyun Li,Sheng Qin,Ke Xing
The biocontrol activity and chemical composition of the volatile organic compounds (VOCs) produced by Pseudomonas chlororaphis subsp. aureofaciens SPS-41 were investigated. The VOCs inhibited mycelial growth and spore germination in Ceratocystis fimbriata, which causes black rot disease in sweet potato tuber roots (TRs) and showed wide-spectrum antifungal activity against several plant pathogenic fungi. A microscopic examination of C. fimbriata cells suggested morphological changes and a loss of cellular contents. Different inoculation strategies significantly affected the antifungal activity of the VOCs. In the volatile profile of SPS-41, the most abundant compound, 3-methyl-1-butanol, followed by phenylethyl alcohol and 2-methyl-1-butanol showed strong inhibition toward C. fimbriata. The weight loss rate and disease severity of the TRs were significantly reduced in response to the VOCs emitted by SPS-41. The results suggest that the VOCs produced by P. chlororaphis subsp. aureofaciens SPS-41 might constitute an attractive biological fumigant for controlling black rot disease in sweet potato TRs.
研究领域:
植物病理学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）