Feedstock suspensions and solutions

Moreno, Rodrigo; Bannier, É.

doi:10.1016/b978-0-85709-769-9.00003-8

Cited by 7 publications

(7 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For an excessively high‐volume fraction of pores, pores will come too close to each other and then collapse. The change in the viscosity due to the presence of spherical inclusions can be expressed from the Bachelor's model as where inclusion is treated as pores for this study [ 81 ] :

η = η_{m} ((), 1 - 2.5 V^{(p)} - 6.2 {V^{((), p)}}^{2}),

where η and η m are the change in viscosity (due to pores) and initial viscosity (without pores), respectively. The surface tension Г is expressed in terms of viscosity η as

Г = A e^{(- \frac{B}{normalη})}

with A and B considered as 0.043 and 0.0011, respectively, for amine‐based polymer epoxy.…”

Section: Resultsmentioning

confidence: 99%

Micromechanical effect of pores on elastic properties of polymer matrix composites

et al. 2020

View full text Add to dashboard Cite

Advanced composite polymer matrix and their different manufacturing processes tend to develop pores of varying size and play a major limiting role in residual stress, damage initiation, matrix cracking, strength, and durability. Direct imaging or simulations to understand the pore formation mechanism in the viscous polymer is difficult. Ultimately, the mechanical performance of the solidified matrix needs better prediction. This paper presents a stochastic micromechanical model, including the effect of pores' formation on the polymer matrix's elastic properties. Theoretical homogenization based micromechanical models for polymer composites is reviewed in the first part. Later, a micromechanical model is proposed considering the different stages of pore formation in a polymer matrix. Polymer samples are fabricated for determining the pore distribution parameters and used appropriately in the proposed model to estimate the elastic properties for a given distribution and volume fraction of the pores. A modified Mori‐Tanaka homogenization approach and a differential scheme of inclusion of pores are incorporated in the model. Results obtained from the proposed model are compared with the experimental measurements, and a significant correlation is found.

show abstract

η = η_{m} ((), 1 - 2.5 V^{(p)} - 6.2 {V^{((), p)}}^{2}),

where η and η m are the change in viscosity (due to pores) and initial viscosity (without pores), respectively. The surface tension Г is expressed in terms of viscosity η as

Г = A e^{(- \frac{B}{normalη})}

with A and B considered as 0.043 and 0.0011, respectively, for amine‐based polymer epoxy.…”

Section: Resultsmentioning

confidence: 99%

Micromechanical effect of pores on elastic properties of polymer matrix composites

et al. 2020

View full text Add to dashboard Cite

show abstract

“…A suspension is a homogeneous mixture of fine solid particles, solvent, and some chemical agents [27,75,173]. The powders are usually sub-micrometric or nano-metric in size.…”

Section: Feedstock Used In Thermal Spray Processesmentioning

confidence: 99%

“…They may be prepared by a top-down approach such as mechanical milling of micrometric powders. Another possibility is the bottom-up way consisting in a synthesis from precursors having desired chemical A suspension is a homogeneous mixture of fine solid particles, solvent, and some chemical agents [27,75,173]. The powders are usually sub-micrometric or nano-metric in size.…”

Section: Feedstock Used In Thermal Spray Processesmentioning

confidence: 99%

Review of Functionally Graded Thermal Sprayed Coatings

et al. 2020

View full text Add to dashboard Cite

The paper briefly describes major thermal spray techniques used to spray functionally graded coatings such as atmospheric plasma spraying, high velocity oxy-fuel spraying, suspension and solution precursor plasma spraying, and finally low and high pressure cold gas spray method. The examples of combined spray processes as well as some examples of post spray treatment including laser and high temperature treatments or mechanical one, are described. Then, the solid and liquid feedstocks used to spray and their properties are shortly discussed. The reviewed properties of functional coatings include: (i) mechanical (adhesion, toughness, hardness); (ii) physical (porosity, thermal conductivity and diffusivity, thermal expansion, photo-catalytic activity), and; (iii) bioactivity and simulated body fluid (SBF) corrosion. These properties are useful in present applications of functionally graded coatings as thermal barriers, the bioactive coatings in prostheses, photo-catalytic coatings in water treatment, coatings used in printing industry (anilox and corona rolls). Finally, some of the future possible fields of functional thermal sprayed coatings applications are discussed, e.g., to coat polymer substrates or to use the cheap technology of low pressure cold gas spray method instead of expensive technology of vacuum plasma spraying to obtain bond coatings.

show abstract

“…In some technologies the final user buys stable suspensions containing the nanoparticles but in most cases they have low solids contents and the packing density of the obtained materials is poor. This is the case, for example, of most commercial suspensions of nanoparticles supplied as feedstocks for the production of thermal barrier coatings or other thick coatings by plasma spraying techniques (156). One possibility to increase the solids content of available suspensions is to disperse solid nanoparticles in those colloidal suspensions.…”

Section: Parameters Influencing the Dispersionmentioning

confidence: 99%

Better ceramics through colloid chemistry

Moreno

2020

Journal of the European Ceramic Society

View full text Add to dashboard Cite

Feedstock suspensions and solutions

Cited by 7 publications

References 51 publications

Micromechanical effect of pores on elastic properties of polymer matrix composites

Micromechanical effect of pores on elastic properties of polymer matrix composites

Review of Functionally Graded Thermal Sprayed Coatings

Better ceramics through colloid chemistry

Contact Info

Product

Resources

About