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"ABSTRAKTelah dilakukan penelitian tentang Pembuatan dan Karakterisasi lapisan JK7112yang dibuat dengan proses HVOF Thermal spray Coating. Sampel diteliti ukuranbutir,struktur kristal,pertumbuhan butir dan perubahan struktur yang akanmenentukan sifat mekanik seperti kekerasan.Pengujian dilakukan dengan ScaningElectron Microscop(SEM),Vickers Hardness tester dan X-RayDifraction(XRD).Hasil yang diperoleh bahwa setelah sample dipanaskan sampaisuhu 600oC ,maka kekerasan lapisan bertambah dan terjadi perubahan phasekristal."

"Pada penelitian ini akan dilakukan dengan pembuatan lapisan woka 3202 pada substrat sehingga memiliki kekerasan maksimal dan porositas yang kecil dengan menggunakan High Velocity Oxi-Fuel (HVOF) Thermal spraying dan di lakukan tempering dengan suhu tetap dan waktu temper dibuat yang bervariasi. Data hasil dari lapisan ini diuji kekerasannya dengan menggunakan uji kekerasan mikro vickers dan ukuran diameter butir grain pada lapisan woka 3202, dianalisa secara mikrostruktur bagaimana perubahan stuktur butiran sebelum dan sesudah dilakukan temper yang waktunya bervariasi dengan menggunakan, mikroskop optik, XRD dan SEM sehingga akan diperoleh hasil yang diharapkan oleh dunia industri."

"Masalah umum yang terjadi pada komponen logam adalah keausan. Proses pelapisan thermal spray high velocity oxygen fuel (HVOF) adalah salah satu metode thermal spray yang relatif paling maju dari segi teknologi dan hasil lapisan yang mampu menghasilkan lapisan dengan ketahanan aus yang tinggi. Kelebihan yang dimiliki metode pelapisan thermal spray high velocity oxygen fuel (HVOF) antara lain adalah lapisan yang memiliki densitas yang tinggi, oksidasi lapisan yang rendah, rentang penggunaan serbuk lapisan yang relatif banyak dan ikatan adhesif yang tinggi.Pada penelitian ini, baja paduan tube ASTM A 213 T91dan baja karbon JIS G3132 SPHT-2 dilakukan grit blasting dilanjutkan dengan pemanasan permukaan pada temperatur 50 °C, 100 °C dan 150°C dengan menggunakan torch. Selanjutnya dilakukan proses thermal spray high velocity oxygen fuel (HVOF) dengan serbuk pelapis CrC-25%NiCr Orlikon Metco. Karakterisasi hasil lapisan dan daerah antarmuka difokuskan pada struktur mikro, tingkat porositas, distribusi kekerasan dan laju keausan spesifik.Hasil yang ditemukan bahwa pelapisan CrC-25%NiCr meningkatkan kekerasn masing-masing substrat 120-220 VHN menjadi 500-800 VHN. Selain itu nilai laju keausan spesifik juga menurun dari 1,66 x 10-6 mm3Kgf-1m-1 menjadi berkisar 7 x 10-8 mm3Kgf-1m-1. Peningkatan temperatur substrat sebelum penyemprotan dapat menurunkan persentase porositas pada lapisan HVOF dan dapat mempengaruhi nilai distribusi kekerasan dan keausan lapisan.

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One of the general problem of metal part is wear. Thermal spray high velocity oxygen fuel (HVOF) coating process is one of most advance coating methode for its technology and the high quality of coating, resulting in high wear ressistance coat. The advantages of thermal spray high velocity oxygen fuel (HVOF) are high density coat, low oxidation coat, wide range of usable coating materials and high adhesive bond strength.

In this study, alloy steel tube ASTM A 213 T91 and low carbon steel JIS G3132 SPHT-2 blasted with alumina and heated for 50 °C, 100 °C dan 150°C. Then the substrate was sprayed with CrC-25%NiCr Orlikon Metco coating in the process of thermal spray high velocity oxygen fuel (HVOF) methode. The characterization focused on microstructure of coating interface, porosity, hardness distribution and spesific wear rate.

It was found that CrC-25%NiCr coating enhace surface hardness from 120-220 VHN to 500-800 VHN. Moreover CrC-25%NiCr coating decrease the value of spesific wear rate from 1,66 x 10-6 mm3Kgf-1m-1 to 7 x 10-8 mm3Kgf-1m-8. It was found that the increasing of substrate temperature could decrease coating porosity and affects coating hardness and spesific wear rate."

"Thermal spray is a coating process that provides functional surface to protect or improve the performance of a substrate or component. Almost any kind and form of material can be thermally sprayed which is why thermal spray is used worldwide to provide protection from corrosion, wear, and heat, to restore and repair components, and for a variety of other applications. This reference handbook is the complete guide to thermal spray technology. It covers principles, processes, types of coatings, applications, performance, and testing/analysis. Developed under the guidance of the Thermal Spray Society Training Committee, the handbook provides an excellent introduction and guidebook for those who are new to thermal spray. It also provides enough in-depth coverage and data that it should be of great value to specifiers and users of thermal spray coatings and to thermal spray experts who need additional background in certain areas."

"Contents : - Quo Vadis Thermal Spraying ? - HVOF-Sprayed Quasicrystal Composite Coatings for Bearing Applications - Functional Ceramic and Metallurgical Coatings on Magnesium Components - Study on Zircon-Based Ceramic Coating for High Temperature Oxidation Resistant Application - Tungsten Coatings for Divertor Wings - Double Doped Ceria Electrolyte Synthesized by Solution Plasma Spraying with Induction Plasma Technology - Replacement for Hard Chrome Plating in Printing Machinery - A contribution to Engine pistons Life Time Improving by Means of Thermal Spray Coatings - Plasma Spraying of Tin on to a Monocrystalline Lithium Fluoride Window - Fabrication and Properties of TiO2 Plioto-Catalytic Coatings by Thermal Spraying with TiO2-AI Agglomerated Powder - XRD and Rietveld Quantitative Pliase Analysis of Radio Frequency Suspension Plasma Sprayed Nano-hydroxyapatite Powders - HVOF Sprayed Hydroxyapatite Coatings: Powders' Melting State and Mechanical Properties - In Vitro Changes on High-Pressure Plasma Sprayed Hydroxyapatite (HA) Caotings - Corrosion Resistant Coatings for Gas Turbine Exhaust Stack Applications - Ceramic Abradable Coatings for Applications up to 1100°C - Production of Superplastic Foils by Thermal Spraying - The Internal Plasma Spraying on Powerful Technology for the Aerospace and Automotive Industries - A Contribution to the Production and Characterization of HVOF coatings for Application in the Petrochemical Field - Process Modelling to Optimise the Structure of Hollow Zirconia Particles for use in Plasma Sprayed Thermal Barrier Coatings - Comparative Study of Different Sealing Methods for Thick Thermal Barrier Coatings - Influence of a Multi-Gas Mixture on the on the Performance of a HPPS Plazjet System for a Thermal Barrier Coating - Effect of Bond Coat Processes and Surface Characteristics on the Failure Mechanism of Thermal Barrier Coatings - Thermal Shock Characteristics of Functionally Graded Thermal Barrier Coatings - Kinetics of Thermally Grown Oxide at Interface Between Thermal Barrier Coatings and MCrAlY Bond Coatings - Reaction Diffusion Behavior of Thermally Sprayed MCrAlY Coatings on Ni-Based Super Alloys - Optimization of Shop Practices for Thermal Barrier Coatings - Removal of Thermal Barrier Coatings from Turbine Blades: A Comparison of Machanical and Chemical Methods - Induction Plasma Synthesis of MoSi2 Ultrafine Powders - Improvements in HVOF Sprayed Cermet Coatings Produced from SHS Powders - Composites Made of Metal Foams With Thermally Sprayed Coatings - Plasma Spray Dissociation ZrSiO4 As The Basis of Forming ZrO2-Mullite Composites from a ZrSiO4 + AI2O3 Mixture - HVOF Sprayed Hydroxyapatite/Titania Composite Coatings - Manufacture of SiC Composite Coatings by HVOF - Hight Temperature Behaviour of Plasma Sprayed ZrB2-SiC Composite Coatings - Abradable Coatings for Low-Temperature Applications - Developments of Plasma Sprayed Ceramic Coatings - Properties of Al203 coatings sprayed by HFPD - On the Tailoring of Spray Dried Thermal Spray Powders - Spray Powders and Coatings on the Basis of Titanium Suboxides - A Comparative Study of the Deposition of Chromium Carbide Based Metal Matrix Composites by Axial Plasma Spray, Air Plasma Spray and High Velocity Oxygen Fuel - Heating Effect of Flame Impingement on polymer Coatings - Mechanical Properties of Thermal Spray PEEK Coatings - Characterization and Mechanical Properties of Flame Sprayed Hydroxyapatite/Polymer Composite Coatings - Structure and Thermal Conductivity of Flame Sprayed Polyamide 11 Coatings Filled with AI2O3, AIN and BN Ceramics - Surface Modification of Recycled PET Plate by Particle Implantation and Deposition with Plasma Spraying - Sprayed Composite Coating of High Performance Thermoplastics - Processing and Characterization of Nanostructured Cermet Coatings - Synthesis and Properties of Multimodal WC-12 Co Coatings - Structure and Properties of HVOF Sprayed Amorphous Polymer Matrix Nanocomposite Coatings - Properties of HVOF Sprayed Multi-Scale Polymer/Silica Nanocomposite Coatings - Control of the Injection of an Alumina Suspension Containing Nanograins in a dc Plasma - Cold Sprayed Nanostructured WC-Co - Low Pressure Plasma Spraying of Sol-Gel Al203/SiC Nanocomposite Coatings - Effects of Shock Waves on Impact Velocity of Cold Spray Particles - Optimization of the Cold Spray Process - Kinetic Powder Compaction Applying the Cold Spray Process A Study on Parameters - Experimental Study of Interaction of Supersonic Gas Jet With a Sub"

"This proceedings volume representing the second International Thermal Spray Conference (May 2004, Osaka, Japan) contains 232 papers and 93 poster presentations. Arrangement is in sections on applications, characterization methods for coating properties, coating technologies for vehicle engines, cold spray, consumables for thermal spraying, corrosion protection, economics and quality, HVOF processes and materials, innovative equipment and process technology, modeling and simulation, nanostructured materials, photocatalytic materials, process diagnostics, protective coatings against wear and erosion, and thermal barrier coatings."