Preparation of Graphene Nanolayers through Surfactant-assisted Pure Shear Milling Method

In this work, the authors studied and compared the two main methods used in dental practice for the automated production of orthopedic structures: the widely used CAD / CAM milling method and the 3D printing technology. As an object of research, temporary crowns were used, which were made on the basis of the same digital model: a) by the method of CAD / CAM milling from polymethylmethacrylate disks; b) by 3D printing from photopolymer resin based on LCD technology. Comparison of production methods and finished designs was carried out according to the following characteristics: strength, durability, aesthetic qualities, accuracy of orthopedic designs, etc. According to the results of the study, it was concluded that 3D printing can be a good alternative to CAD / CAM milling in solving problems of temporary prosthetics.

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Structure-controlled Nanomaterial Synthesis using Surfactant-assisted Ball Milling- A Review

Current Nanoscience ◽

10.2174/15734137113096660114 ◽

2014 ◽

Vol 10 (3) ◽

pp. 344-354 ◽

Cited By ~ 12

Author(s):

Mahbub Ullah ◽

Md. Ali ◽

Sharifah Hamid

Keyword(s):

Ball Milling ◽

Nanomaterial Synthesis ◽

Surfactant Assisted

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Evaluation of dimensional accuracy of dental bridges manufactured with conventional casting technique and CAD/CAM system with Ceramill Sintron blocks using CMM

Journal of Dental Research Dental Clinics Dental Prospects ◽

10.15171/joddd.2018.041 ◽

2018 ◽

Vol 12 (4) ◽

pp. 264-271 ◽

Cited By ~ 2

Author(s):

Alireza Izadi ◽

Fariborz Vafaee ◽

Arash Shishehian ◽

Ghodratollah Roshanaei ◽

Behzad Fathi Afkari

Keyword(s):

Reference Model ◽

Coordinate Measuring Machine ◽

Dimensional Accuracy ◽

Three Dimensions ◽

Casting Technique ◽

Dimensional Changes ◽

Conventional Casting ◽

Cad Cam ◽

Milling Method ◽

Measuring Machine

Background. Recently, non-presintered chromium-cobalt (Cr-Co) blocks with the commercial name of Ceramill Sintron were introduced to the market. However, comprehensive studies on the dimensional accuracy and fit of multi-unit frameworks made of these blocks using the coordinate measuring machine (CMM) are lacking. This study aimed to assess and compare the dimensional changes and fit of conventional casting and milled frameworks using Ceramill Sintron. Methods. A metal model was designed and scanned and 5-unit frameworks were fabricated using two techniques: (I) the conventional casting method (n=20): the wax model was designed, milled in the CAD/CAM machine, flasked and invested; (II) the milling method using Ceramill Sintron blocks (n=20): the wax patterns of group 1 were used; Ceramill Sintron blocks were milled and sintered. Measurements were made on the original reference model and the fabricated frameworks using the CMM in all the three spatial dimensions, and dimensional changes were recorded in a checklist. Data were analyzed with descriptive statistics, and the two groups were compared using one-way ANOVA and Tukey test (α=0.05). Results. The fabricated frameworks in both groups showed significant dimensional changes in all the three dimensions. Comparison of dimensional changes between the two groups revealed no significant differences (P>0.05) except for transverse changes (arch) that were significantly greater in Ceramill Sintron frameworks (P<0.05). Conclusion. The two manufacturing processes were the same regarding dimensional changes and the magnitude of marginal gaps and both processes resulted in significant dimensional changes in frameworks. Ceramill Sintron frameworks showed significantly greater transverse changes than the conventional frameworks.

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An octahedral stress-based fracture criterion for hyperelastic materials

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406220972136 ◽

2020 ◽

pp. 095440622097213

Author(s):

A Hamdi ◽

A Boulenouar ◽

N Benseddiq

Keyword(s):

Pure Shear ◽

Thermoplastic Elastomer ◽

Styrene Butadiene Rubber ◽

Butadiene Rubber ◽

Principal Stresses ◽

Hyperelastic Materials ◽

Biaxial Tests ◽

Set Up ◽

Loading Modes ◽

Styrene Butadiene

No uniﬁed stress-based criterion exists, in the literature, for predicting the rupture of hyperelastic materials subjected to mutiaxial loading paths. This paper aims to establish a generalized rupture criterion under plane stress loading for elastomers. First, the experimental set up, at breaking, including various loading modes, is briefly described and commented. It consists of uniaxial tests, biaxial tests and pure shear tests, performed on different rubbers. The used vulcanizate and thermoplastic rubber materials are a Natural Rubber (NR), a Styrene Butadiene Rubber (SBR), a Polyurethane (PU) and a Thermoplastic elastomer (TPE). Then, we have investigated a new theoretical approach, based upon the principal stresses, to establish a failure criterion under quasi-static loadings. Thus, we have proposed a new analytical model expressed as a function of octahedral stresses. Quite good agreement is highlighted when comparing the ultimate stresses, at break, between the experimental data and the prediction of the proposed criteria using our rubber-like materials.

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Characterization of magnetic properties of low-temperature phase (LTP) synthesized by surfactant-assisted cryo-milling process in Mn-Bi binary system

IEEE Transactions on Magnetics ◽

10.1109/tmag.2021.3083967 ◽

2021 ◽

pp. 1-1

Author(s):

Cheoljun Bae ◽

Gyutae Lee ◽

Min Kyu Kang ◽

Hansol Lee ◽

Jongryoul Kim

Keyword(s):

Magnetic Properties ◽

Binary System ◽

Low Temperature ◽

Milling Process ◽

Temperature Phase ◽

Low Temperature Phase ◽

Surfactant Assisted

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Correction: An anionic and cationic surfactant-assisted hydrothermal synthesis of cobalt oxide nanoparticles as the active electrode material for supercapacitors

New Journal of Chemistry ◽

10.1039/d1nj90018h ◽

2021 ◽

Author(s):

R. R. Samal ◽

Aneeya K. Samantara ◽

S. Mahalik ◽

J. N. Behera ◽

B. Dash ◽

...

Keyword(s):

Hydrothermal Synthesis ◽

Cobalt Oxide ◽

Cationic Surfactant ◽

Electrode Material ◽

Oxide Nanoparticles ◽

Active Electrode ◽

Cobalt Oxide Nanoparticles ◽

Surfactant Assisted

Correction for ‘An anionic and cationic surfactant-assisted hydrothermal synthesis of cobalt oxide nanoparticles as the active electrode material for supercapacitors’ by R. R. Samal et al., New J. Chem., 2021, 45, 2795–2803; DOI: 10.1039/D0NJ05088A.

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