Cavitation Erosion Resistance Of FeAl Intermetallic Alloys And Al2O3 – Based Ceramics

Abstract

The problem of the devastation of fluid-flow machinery components is very complex, because it consists of processes of erosion and corrosion. The most dangerous factor is the cavitation phenomenon, which is very difficult to eliminate through the use of design solutions. Usage of materials with greater resistance to cavitation erosion seems to be an obvious effective method of prevention. Such materials as FeAl intermetallic alloys and ceramic materials may be considered as reasonable candidates for this purpose. In the presented work, cavitation erosion resistance of FeAl intermetallic alloys and Al 2 O 3 -based ceramic materials, was investigated and compared.Keywords: cavitation, cavitation wear, intermetallic alloys, Al 2 O 3 -based ceramicsProblem niszczenia elementów maszyn przepływowych jest bardzo złożony, ponieważ składa się z procesów erozyjnych i korozyjnych. Najbardziej niebezpiecznym czynnkiem jest zjawisko kawitacji, które bardzo trudno jest wyeliminować poprzez stosowanie rozwiązań konstrukcyjnych. Skutecznym rozwiązaniem jest stosowanie materiału o większej odporności na erozję kawitacyjną. Takimi materiałami mogą być stopy intermetaliczne FeAl lub materiały ceramiczne. W pracy przedstawiono porównanie odporności na erozję kawitacyjną stopów intermetalicznych FeAl i materiałów ceramicznych na bazie Al 2 O 3 .

Destruction Mechanism of ZnAl4 as Cast Alloy Subjected to Cavitational Erosion Using Different Laboratory Stands

“…Finally, the cavitation on the jest impact stand begins with the washout of the η solid solution and then the erosion of η+α eutectic. The above destruction mechanisms differ from the observed on the surface of the samples the same alloy which has been examined as a liquid impact stand [11].…”

Cavitation Wear of Basalt-Based Glass Ceramic

“…Cavitation is a kind of wear and represents formation, growth, and implosion (collapse) of steam or vapor gas bubbles in a flowing fluid [17,18,19,20,21,22,23,24,25]. Implosion of bubbles is caused by shock waves and micro-jet-stress concentrators which energy is either dissipated within the liquid or absorbed by a solid contact surface [26,27,28,29,30,31,32,33]. It has been shown that the impact formed by collapsing cavitation bubbles have amplitudes between the strength values on the boundary of large elongations and the tensile strength of the material, thus contributing to formation of elastic/plastic deformation and surface hardening.…”

Comparison of the formation and development of cavitation damage on cast and sintered samples based on basalt

“…The formation and development of damage to the surface of the materials depends on numerous parameters. In the literature there are numerous results of the investigation of the occurrence of damage to materials caused by cavitation [16][17][18][19][20]. The structure and properties of the material (above all the hardness and strength of the material) as well as hydrodynamic parameters of the cavitation process show the great influence on material resistance under cavitation conditions [21][22][23][24][25].…”