Effect of coated PHB on properties of abradable seal coating

Abstract

As pore-forming materials, the coated poly-p-hydroxybenzoate(short for PHB) and h-BN can be applied in the preparation of abradable seal coatings at high temperature. The characteristics of coating such as morphology, thermal stability and composition were studied by SEM, EDS and FTIR. The results show that the modified PHB will change the remained carbon amount, porosity and pore morphology of the coating, which can affect the properties of coatings. If the pore is small enough in uniform distribution, the coating with 5 MPa bond strength, 30–55 HR45Y superficial hardness and certain of carbon can be suitable to well abradability.

Keywords

coated-PHB / pore morphology / seal coating

References

[1] Ahmaniemi S, Vuoristo P, Mantyla T Improved Sealing Treatments for Thick Thermal Barrier Coatings[J]. Surface and Coatings Technology, 2002, 151–152: 412-417.

[2] Faraoun H I, Seichepinea J L, Coddeta C, . Modelling Route for Abradable Coatings[J]. Surface & Coatings Technology, 2006, 200: 6 578-6 582.

[3] Akimune Y, Matsuo K, Sodeoka S, . Point Loadinduced Fracture Behavior in Zirconia Plasma Spray Coating[J]. Ceramics International, 2004, 30: 2 251-2 257.

[4] Shih W-J, Chen Y-H, Shih C-J, . Structural and Morphological Studies on Poly(3-hydroxybutyrate acid) (PHB)/Chitosan Drug Releasing Microspheres Prepared by both Single and Double Emulsion Processes[J]. Journal of Alloys and Compounds, 2007, 434–435: 826-829.

[5] Sanjuán M L, Oliete P B, Várez A, . The Role of Ce Reduction in the Segregation of Metastable Phases in the ZrO₂-CeO₂ System[J]. Journal of the European Ceramic Society, 2012, 32: 689-696.

[6] Johnston R E The Sensitivity of Abradable Coating Residual Stresses to Varying Material Properties[J]. Journal of Thermal Spray Technology, 2009, 18(5–6): 1 004-1 013.

[7] Lee P-H, Lee S-Y, Kwon J-Y, . Thermal Cycling Behavior and Interfacial Stability in Thick Thermal Barrier Coatings[J]. Surface & Coatings Technology, 2010, 205: 1 250-1 255.

[8] Liang B, Zhang G, Liao H L, . Structure and Tribological Performance of Nanostructured ZrO₂-3 mol% Y₂O₃ Coatings Deposited by Air Plasma Spraying[J]. Journal of Thermal Spray Technology, 2010, 19(6): 1 163-1 170.

[9] Chandradass J, Balasubramanian M Sol-gel Processing of Alumina-Zirconia Minispheres[J]. Ceramics International, 2005, 31: 743-748.

[10] Li S-D, He J-D, Yu P H, . Thermal Degradation of Poly(3-hydroxybutyrate) and Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) as Studied by TG, TG-FTIR, and Py-GC/MS[J]. Iranian Polymer Journal, 2011, 20(5): 423-432.

[11] Karaoglanli A C, Altuncu E, Ozdemira I, . Structure and Durability Evaluation of YSZ+Al₂O₃ Composite TBCs with APS and HVOF Bond Coats under Thermal Cycling Conditions[J]. Surface & Coatings Technology, 2011, 205: S369-S373.

[12] Yu Q, Rauf A, Zhou C Microstructure and Thermal Properties of Nanostructured 4 wt%Al₂O₃-YSZ Coatings Produced by Atmospheric Plasma Spraying[J]. Journal of Thermal Spray Technology, 2010, 19(6): 1 294-1 300.

[13] Richardt K, Bobzin K, Sporer D, . Tailor-Made Coatings for Turbine Applications Using the Triplex Pro 200[J]. Journal of Thermal Spray Technology., 2008, 17(5–6): 612-616.

[14] Tseng T Y, Lin C C, Liaw J T Phase Transformation of Gel-derived Magnesia Partially Stabilized Zirconias[J]. Journal of Materials Science, 1987, 22: 965-972.

[15] He X, Zhang Y Z, Mansell J P, . Zirconia Toughened Alumina Ceramic Foams for Potential Bone Graft Applications: Fabrication, Bioactivation, and Cellular Responses [J]. Journal of Materials Science, 2008, 19: 2 743-2 749.

[16] Mesrati N, Saif Q, Treheuxb D, . Characterization of Thermal Fatigue Damage of Thermal Barrier Produced by Atmospheric Plasma Spraying[J]. Surface & Coatings Technology, 2004, 187: 185-193.

[17] Faraoun H I, Grosdidiera T, Seichepine J-L, . Improvement of Thermally Sprayed Abradable Coating by Microstructure Control[J]. Surface & Coatings Technology, 2006, 201: 2 303-2 312.

[18] Karimi Verdon C, Barbezat G Microstructure and Hydroabrasive Wear Behaviour of High Velocity Oxy-Fuel Thermally Sprayed WC-Co(Cr) Coatings[J]. Surface & Coatings Technology, 1993, 57: 81-89.

[19] Patterson T, Leon A, Jayaraj B, . Thermal Cyclic Lifetime and Oxidation Behavior of Air Plasma Sprayed CoNiCrAlY Bond Coats for Thermal Barrier Coatings[J]. Surface & Coatings Technology, 2008, 203: 437-441.

[20] He Y, Winnubst L, Burggraaf A J, . Influence of Porosity on Friction and Wear of Tetragonal Zirconia Polycrystal[J]. Journal of the American Ceramic Society, 1977, 80(2): 377-380.