The wear mechanisms occurring in abradable seals of gas turbines

Borel, Marc-Olivier; Nicoll, A.R.; ̈pfer, H.W. Schla; Schmid, R.K.

doi:10.1016/0257-8972(89)90046-7

Cited by 83 publications

(51 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…46 Material compaction limits the functional depth of the abradable material since the compacted material will increase the wear of the rotating blade tips as the porosity is reduced. These types of seal materials include some of the thermal spray coatings and porous metal fiber structures (fiber metals).…”

Section: Interface Rubmentioning

confidence: 99%

Turbomachinery Clearance Control

Chupp

Hendricks

Lattime

et al. 2014

Turbine Aerodynamics, Heat Transfer, Materials, and Mechanics

View full text Add to dashboard Cite

show abstract

Section: Interface Rubmentioning

confidence: 99%

Turbomachinery Clearance Control

Chupp

Hendricks

Lattime

et al. 2014

Turbine Aerodynamics, Heat Transfer, Materials, and Mechanics

View full text Add to dashboard Cite

show abstract

“…Such coatings are used in some gas turbines to help accommodate dimensional changes associated with heating and cooling cycles, limit damage to the underlying components, and minimise the clearance between rotating and stationary parts. 13 The goal is to limit gas leaks that can lead to a decreased efficiency. Two coating chemistries were investigated using nanostructured powders to determine the feasibility of engineering coatings having properties suitable for abradable surfaces.…”

Section: Abradable Coatingsmentioning

confidence: 99%

Engineering nanostructured thermal spray coatings: process–property–performance relationships of ceramic based materials

Marple

Lima

2007

Advances in Applied Ceramics

View full text Add to dashboard Cite

Nanostructured powders were deposited using thermal spraying to produce coatings having internal features of nanosized dimensions. Several ceramic based materials were studied, including WC-12 wt-%Co, TiO 2 , hydroxyapatite, Al 2 O 3 -13 wt-%TiO 2 and yttria stabilised zirconia. The effect of the thermal spray conditions on the microstructure, phase composition, properties and performance was investigated. Key nanostructural features of the coatings were identified and their potential benefit in contributing to enhanced behaviour explored. Issues relating to design strategies and process control for engineering these types of coatings with performance characteristics tailored for targeted applications are discussed.

show abstract

“…Bounazef et al [2] and Fois et al [13] Investigated the AlSi-hBN Vs Ti(6,4) rub, which is the subject of this paper, finding that: at high incursion rates the abradables cut effectively but at low incursion rates the abradable material transferred to the titanium blades. M. O. Borel et al [5] tested with two slightly different AlSi-plastic abradables against titanium blades and observed both melt wear and adhesive transfer at low incursion rates. This difference they attributed to the type of plastic in each abradable.…”

Section: Introductionmentioning

confidence: 99%

“…Abradable linings [1][2][3][4][5] are composite materials used on the inside of aero-engine casings. During engine operation the rotating blades may strike the wall of the casing.…”

Section: Introductionmentioning

confidence: 99%

The influence of material properties on the wear of abradable materials

Fois

Watson

Marshall

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

In aero-engines it is possible for the blades of the compressor, turbine or fan to incur into their casings. At these interfaces a lining of composite abradable material is used to limit damage to components and thereby sustain the efficiency and longevity of the engine as a whole. These composite materials must have good abradability and erosion resistance. Previously, the wear mechanisms at the contact between the blade and the coating have been characterized using stroboscopic imaging and force measurement on a scaled test-rig platform.This work is focused on the characterization of the wear mechanism for two different of abradable lining. The established stroboscopic imaging technique and contact force measurements are combined with sectioning of the abradable material in order to analyse the material`s response during the tests. A measure of the thermal properties and the resulting temperature of the linings during the test have also been made to further understand the effect of coating hardness.The wear mechanism, material response, contact force and thermal properties of the coating have been used to characterize the different material behaviour with different hardness. At low incursion rates, with a soft coating, the blade tip becomes worn after an initial adhesive transfer from the coating. Post-test sectioning showed blade material and significant compaction present in the coating. The harder coating produced adhesion on the blade tip with solidification observed in the coating. Thermal diffusivity measurements and modelling indicated that thermally driven wear observed was as a consequence of the increased number of boundaries between the metal and hBN phases present interrupting heat flow, leading to a concentration of surface heat. At higher incursion rates the wear mechanism is more similar between the coatings and a cutting mechanism dominates producing negligible adhesion and blade wear.

show abstract

The wear mechanisms occurring in abradable seals of gas turbines

Cited by 83 publications

References 2 publications

Turbomachinery Clearance Control

Turbomachinery Clearance Control

Engineering nanostructured thermal spray coatings: process–property–performance relationships of ceramic based materials

The influence of material properties on the wear of abradable materials

Contact Info

Product

Resources

About