In-situ He+ irradiation induced crystallization on crystalline/amorphous ZrC films

Jiang, Shengming; Zhu, Rongfeng; Chen, Ming; He, Hailin; Lin, Zhiwei; Hu, Xiaotian; Zhang, Jian; Cao, Liuxuan; Huang, Zijing

doi:10.1016/j.mtcomm.2021.102580

Cited by 4 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, two carbon−oxygen bonds in the −COO− group are actually two equivalent sp 2 hybridized bonds, i.e., the −COO− group has two resonance structures and its true structure is a resonance hybrid, Figure 3d. Accordingly, the −COO− group and the carbon directly attached to the ester carbon are trigonal planar, with the ester carbon sited at the trigonal center, structure (19). Hence, in the −COO− group, bonds cannot rotate freely.…”

Section: Resultsmentioning

confidence: 99%

“…However, most researchers are focusing on inorganic materials. 19 Some publications that involved polymer materials mainly discussed crystallization kinetics and crystallinity change. 20 Some mechanisms of irradiation-induced crystallization have been presented for polymer materials based on tie-molecule breakup or chain scission.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, irradiation-induced crystallizations have already been reported by many researchers. However, most researchers are focusing on inorganic materials . Some publications that involved polymer materials mainly discussed crystallization kinetics and crystallinity change .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electron-Induced Alteration of PLA Chain Structure

Zhang,

Müller,

Boldt

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Cross-linked polylactides (PLAs) were produced by electron beam (EB) irradiation at 80 °C using different preset crystallinities (0 to 13.3%), without using crosslinking-promoting additives. Based on functional group conversion detected by Fouriertransform infrared spectroscopy, molecular build-up mechanisms based on a two-stage chain recombination (from geometric T-type to H-type branching) were proposed for EB-induced cross-linking in additive-free PLA. Furthermore, EB-induced PLA crystallization has been discussed based on the combined evidence from morphology, crystallinity, and crystallization behaviors identified by polarized-light optical microscopy, X-ray diffraction, and differential scanning calorimeter (DSC). Several interpretations of the thermal property of EB-induced cross-linked PLA were presented from the point of view of chain scission and cross-linking in a coexisted system. The high irradiation dose obviously shifted the melting temperature (T m ) and cold crystallization temperature (T cc ) of irradiated PLA to a lower region than those of neat PLA. Moreover, the different preset crystallinities of the PLA starting materials did not lead to an obvious difference among irradiated PLAs with respect to T g , T m , T cc , and cross-link density, according to DSC and equilibrium swelling measurements.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electron-Induced Alteration of PLA Chain Structure

Zhang,

Müller,

Boldt

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…Jiang et al demonstrated that an a-to-c transformation could be induced in amorphous ZrC by irradiating with 30 keV He + ions at an ion flux of 1.79 × 10 13 ions/cm 2 -s to various fluences at 593 K [ 59 ]. The sample was prepared by depositing amorphous ZrC on a layer of crystalline ZrC using magnetron sputtering.…”

Section: Review Of Observed A-to-c Transformationsmentioning

confidence: 99%

“…This analysis found that the observed a-to-c transformation tended to occur at depths where the relative concentration of C was lower, and this concentration gradient occurred near the interface between the amorphous and crystalline layers of ZrC. Therefore, He + irradiation seemed to preferentially form ZrC crystals near the amorphous-to-crystalline interphase where the C concentration was lower, and irradiation enhanced diffusion of Zr and C atoms would cause crystallites to gradually develop closer to the sample surface as the C to Zr ratio was decreased as a result of ion irradiation [ 59 ].…”

Section: Review Of Observed A-to-c Transformationsmentioning

confidence: 99%

Irradiation-Induced Amorphous-to-Crystalline Phase Transformations in Ceramic Materials

et al. 2022

View full text Add to dashboard Cite

Amorphous ceramics are a unique class of materials with unusual properties and functionalities. While these materials are known to crystallize when subjected to thermal annealing, they have sometimes been observed to crystallize athermally when exposed to extreme irradiation environments. Because irradiation is almost universally understood to introduce disorder into materials, these observations of irradiation-induced ordering or crystallization are unusual and may partially explain the limited research into this phenomenon. However, the archival literature presents a growing body of evidence of these irradiation-induced amorphous-to-crystalline (a-to-c) phase transformations in ceramics. In this perspective, the summary and review of examples from the literature of irradiation-induced a-to-c transformations for various classifications of ceramics are provided. This work will highlight irradiation conditions and material parameters that appear most influential for activating a-to-c transformations, identify trends, examine possible mechanisms, and discuss the impact of a-to-c transformations on material properties. Finally, future research directions that will enable researchers to harness a-to-c transformations to tailor materials behaviors will be provided.

show abstract

FTIR spectroscopy of ZrC nanoparticles under the gamma radiation

Huseynov

2023

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

In-situ He+ irradiation induced crystallization on crystalline/amorphous ZrC films

Cited by 4 publications

References 38 publications

Electron-Induced Alteration of PLA Chain Structure

Electron-Induced Alteration of PLA Chain Structure

Irradiation-Induced Amorphous-to-Crystalline Phase Transformations in Ceramic Materials

FTIR spectroscopy of ZrC nanoparticles under the gamma radiation

Contact Info

Product

Resources

About