Viscoelastic properties of hollow glass particle filled vinyl ester matrix syntactic foams: effect of temperature and loading frequency

Syntactic foams are porous particulate composites fabricated by mixing hollow particles called micro-balloons into a matrix material such as metal, polymer, ceramic etc. Fillers i.e. micro balloons are used to decrease the amount of expensive matrix material and/or to enhance or tailor some properties of matrix materials. The different variations in density and properties of syntactic foam could be obtained by changing the material, volume fraction and/ or density of micro balloons. Here the hybrid syntactic foams were synthesized by adding two different filler materials that are hollow glass microballoons and flyash cenospheres into vinyl ester matrix. Two types of hybrid systems are created one with 50% total filler content and another with 60% total filler content in a matrix whereas, within these hybrid systems an internal composition of two fillers were varied in a step of 25 vol% with respect to each other. Hybridization of two different types of ceramic microballoons in vinyl ester matrix gives maximum 111% increase in impact strength with respect to plane hollow glass microsphere syntactic foam. Hybridization also causes lncrease in flexural strength and Flexural modulus by 39% and 58% respectively.

Download Full-text

Fabrication of heat-resistant syntactic foams through binding hollow glass microspheres with phosphate adhesive

Materials & Design ◽

10.1016/j.matdes.2016.01.108 ◽

2016 ◽

Vol 95 ◽

pp. 32-38 ◽

Cited By ~ 15

Author(s):

Haitao Geng ◽

Jiachen Liu ◽

Anran Guo ◽

Sue Ren ◽

Xiqing Xu ◽

...

Keyword(s):

Syntactic Foams ◽

Glass Microspheres ◽

Hollow Glass Microspheres ◽

Hollow Glass ◽

Heat Resistant

Download Full-text

Density and Drag Reduction With Hollow Glass Additives

Volume 5: Materials Technology; Petroleum Technology ◽

10.1115/omae2014-23401 ◽

2014 ◽

Author(s):

Bahri Kutlu ◽

Evren M. Ozbayoglu ◽

Stefan Z. Miska ◽

Nicholas Takach ◽

Mengjiao Yu ◽

...

Keyword(s):

Drag Reduction ◽

Rheological Behavior ◽

Drilling Fluid ◽

Hydraulic Drag ◽

Effect Of Temperature ◽

Survival Ratio ◽

Fluid Density ◽

Hollow Glass ◽

Glass Spheres ◽

Reduction Effect

This study concentrates on the use of materials known as hollow glass spheres, also known as glass bubbles, to reduce the drilling fluid density below the base fluid density without introducing a compressible phase to the wellbore. Four types of lightweight glass spheres with different physical properties were tested for their impact on rheological behavior, density reduction effect, survival ratio at elevated pressures and hydraulic drag reduction effect when mixed with water based fluids. A Fann75 HPHT viscometer and a flow loop were used for the experiments. Results show that glass spheres successfully reduce the density of the base drilling fluid while maintaining an average of 0.93 survival ratio, the rheological behavior of the tested fluids at elevated concentrations of glass bubbles is similar to the rheological behavior of conventional drilling fluids and hydraulic drag reduction is present up to certain concentrations. All results were integrated into hydraulics calculations for a wellbore scenario that accounts for the effect of temperature and pressure on rheological properties, as well as the effect of glass bubble concentration on mud temperature distribution along the wellbore. The effect of drag reduction was also considered in the calculations.

Download Full-text