Zobrazeno 1 - 10
of 128
pro vyhledávání: '"Yongfeng Shen"'
Autor:
Weina Zhang, Zhanjie Gao, Hao Wei, Huimin Zhang, Zejin Chen, Wenying Xue, Yongfeng Shen, Zhenyu Liu
Publikováno v:
Nanomaterials, Vol 14, Iss 16, p 1335 (2024)
The precipitation behavior of Cu-bearing ultra-low carbon steel after step quenching and tempering at 923 K for 0.5–2.5 h was investigated. The size, quantity, and characteristic distribution of nano-precipitates were analyzed using transmission el
Externí odkaz:
https://doaj.org/article/7989dcad9aa244b8a8f7888bb3aa5418
Publikováno v:
Nanomaterials, Vol 14, Iss 15, p 1296 (2024)
The addition of Co to Ni-based alloys can reduce the stacking fault energy. In this study, a novel Ni-26.6Co-18.4Cr-4.1Mo-2.3Al-0.3Ti-5.4Nb alloy was developed by increasing the Co addition to 26.6 wt.%. A new strategy to break the trade-off between
Externí odkaz:
https://doaj.org/article/fecacd685fa34131addecc578ae406aa
Publikováno v:
Medžiagotyra, Vol 29, Iss 1, Pp 58-64 (2023)
As an important part of cultural heritage, paper cultural relics have important historical, scientific and humanistic values. However, a large number of paper cultural relics are suffering from aging, mildew, yellowing, cracks, embrittlement and othe
Externí odkaz:
https://doaj.org/article/cd3f4e315301462184a6622b7bf49050
Publikováno v:
Medžiagotyra, Vol 28, Iss 1, Pp 60-67 (2022)
Cellulose is a rich natural polymer material, which has the characteristics of biodegradability, environmental friendliness and good biocompatibility. However, compared with conventional materials, there are some shortcomings in performance, such as
Externí odkaz:
https://doaj.org/article/95e734efc80748b2a717f8e209ed839d
Publikováno v:
Nanomaterials, Vol 13, Iss 5, p 956 (2023)
A medium-carbon low-alloy steel was prepared via the asymmetric rolling process with different ratios of upper and down roll velocities. Subsequently, the microstructure and mechanical properties were explored by using SEM, EBSD, TEM, tensile tests a
Externí odkaz:
https://doaj.org/article/bcae1b5477e9499ab610044ecebc7384
Publikováno v:
Medžiagotyra, Vol 27, Iss 1, Pp 63-67 (2021)
A novel epoxy cyclohexane-based polyurethane material was synthesized from a self-made epoxy cyclohexane-tetrahydrofuran (CHO-THF) co-polyether. Due to the special rigid six-membered ring skeleton in the polyether molecular chain, the polyurethane ma
Externí odkaz:
https://doaj.org/article/1ff4482fc23b4c77b6a935bfb0ad6521
Publikováno v:
Medžiagotyra, Vol 26, Iss 3, Pp 323-332 (2020)
The polycarbonate polyols(PCD) obtained by ring-opening polymerization of a general cyclic monomer is mostly a linear flexible structure, which is used as a raw material to synthesize polyurethanes, and it is difficult to simultaneously ensure good t
Externí odkaz:
https://doaj.org/article/0020dd8add01467cafc2dcd743fe2414
Publikováno v:
Medžiagotyra, Vol 26, Iss 3, Pp 343-347 (2020)
Epoxycyclohexane-epichlorohydrin polyether polyol was synthesized by using epoxy cyclohexane and epichlorohydrin as raw materials, glycerol as an initiator, dichloromethane as solvent and aluminum chloride as catalysis. The structure of the copolyeth
Externí odkaz:
https://doaj.org/article/1d68f932307c4945805435a4c9ca4afd
Autor:
Zhangfan Lu, Jiadong Wang, Yang Cao, Chenglong Sun, Quan Du, Yongfeng Shen, Wenhua Yu, Yuanfeng Du
Publikováno v:
Frontiers in Neurology, Vol 13 (2022)
ObjectiveTo investigate the efficacy of modified percutaneous balloon compression for simple third branch pain and its postoperative complications.MethodsClinical data and surgical records of 132 patients with third branch pain treated with percutane
Externí odkaz:
https://doaj.org/article/b51fb85075754730a911fad81c997ed7
Publikováno v:
Crystals, Vol 12, Iss 6, p 806 (2022)
The uniaxial tensile loading tests of coarse-grained D6A steel (CG, d = 20 μm) and fine-grained D6A steel (FG, d = 1.5 μm) were performed using a material testing machine and rotating disk Hopkinson tension bar, respectively. The stress–strain cu
Externí odkaz:
https://doaj.org/article/a4eb4682b13c47c39637f8010c260f6d