Polymers
·
2022
·Vol. 14
·期 21
·4604
·
IF 4.967
Zhiqing Wu,Fan Lei,Zhiqiang Zhan,Jiangshan Luo,Gao Niu,Zhaoguo Li,Tao Yi,Shufan Chen,Bo Yang,Qiubo Fu,Zhiming Zhang
The exploding foil initiator (EFI) system has been extensively used in ignition and detonation sequences and proved to be of high safety and reliability. Polyimide is considered the ideal flyer material for EFI due to its excellent performance, including thermal stability, outstanding mechanical properties, high radiation resistance, and excellent dielectric properties. In this study, we prepared the EFI based on a polyimide (ODPA-ODA) flyer, which is spin-coated and solidified on patterned copper film in situ. The electric explosion test shows that the prepared EFI has good working performance, and the 4000 V working voltage drove the flyer to reach a maximum velocity of 5096 m/s. The polyimide morphology and chemical structure after the electric explosion was observed by microscope, SEM, XPS, and FTIR, which showed that the polyimide flyer underwent thermal deformation and complex chemical reactions during an electric explosion. A large number of polyimide bonds broke to form new carbonyl compounds, and the opening of aromatic rings was accompanied by the formation of aliphatic hydrocarbon chains. The morphology and chemical structure analysis after the electric explosion test will lay a foundation for us to further understand the working principle and evolution process of polyimide (ODPA-ODA) flyer.Keywords:exploding foil initiator;polyimide;flyer;plasma;morphology;chemical structure
研究领域:
材料科学
·
爆炸物理
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 103
·100790-100795
·
IF 3.289
Daixiong Zhang,Qing Xiang,Xueming Li
As a nanoenergetic material with high energy density, nanothermite coatings composed of metal and oxidant have potential applications in electric-explosion devices. In this study, a novel highly reactive Al–Cr2O3 coating was successfully fabricated via electrophoretic deposition (EPD) technology. Moreover, with the advantage of high fabrication rate by employing high concentration of Al and Cr2O3 nanoparticles, an electric-explosion device with successful explosion could be easily obtained via assembling an Al–Cr2O3 coating onto Cu electric-explosion bridges in only 1 minute, which is much more efficient than other coating technologies. More importantly, considering the successful preparation of other reactive coatings in previous work, we also believe that EPD is a promising general strategy for rapidly preparing electric-explosion device with many other nanoenergetic material coatings such as nanothermite and bimetallic reactive composites.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuai Ma,Qinghai Shu,Ting Zhang,Manman Wang,Haoming Zou,Xijuan Lv,Shuai Zhao
To optimize the energy release of boron (B), we originally prepared B@Mg composites via the electrical explosion of wires method. SEM-EDS, XPS, ATR-IR, and XRD results confirmed that nano-scale magnesium (Mg) particles adhere to the surface of B. The pressure cell results showed that with increasing Mg content, the peak pressure and pressurization rate initially increased and then decreased, peaking at B@9 %Mg with values of 40.28 kPa and 2350 kPa/s, which are 1.11 times and 2.41 times those of raw B, respectively. Laser ignition and combustion spectrum tests revealed that B@9 %Mg exhibited intense and complete energy release. The maximum flame height of the B@Mg/ammonium perchlorate (AP) mixture increases with higher Mg content due to synergistic effects within the B@Mg/AP system. The introduction of Mg promoted the shell-breaking of B@Mg composites, thus accelerating the ignition process. The co-combustion of Mg and B boosted the heat release, promoting AP decomposition. Small molecules from AP decomposition reduce particle agglomeration, enhancing combustion efficiency. Further transient reactivity evaluations on energetics with ammonium oxalate (AO) demonstrated that B@9 %Mg exhibited superior performance, with the fastest flame propagation speed, highest peak pressure, and pressurization rate, which are 2.10 times, 1.59 times, and 1.75 times those of raw B, respectively. Additionally, the high-temperature steam test results showed that B@9 %Mg had the highest pressurization rate of 25.47 MPa/s, 2.2 times that of raw B. Finally, SEM-EDS analysis of the combustion residue revealed that Mg alters the structural distribution of the residues. Different from the combustion products of raw B, Mg is uniformly distributed in the residues of B@9 %Mg, reducing the inhibition of B 2 O 3 on the combustion of B behavior and thus enhancing its energy release.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 8
·1173-1177
·
IF 0
Wang Jingchuan,Yao Yong,Luo Junhong,Yao Weizhi,Gao Bo,Chen Chang'an
Nitrogen is potentially used in tokamak as seed impurity for avoiding divertor damage and achieving good plasma performance. Herein, the secondary effect of nitrogen was studied by wire electrical explosion (WEE) method. In the presence of nitrogen, the inventory of hydrogen retention
in the tungsten dust was largely increased, while hydrogen was retained by chemical bonding with nitrogen, besides dissolving into lattice and trapping in defects of tungsten, which was identified by FTIR and XRD. This study indicates that nitrogen seed impurity will cause serious tritium
retention and speed tungsten-based plasma facing components (PFC)' erosion.
研究领域:
核聚变
·
材料科学
·
等离子体物理
✓ 已验证
DOI
危险品化学品经营许可证（带存储）