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microhardness

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Proceedings Papers

ITSC1996, Thermal Spray 1996: Proceedings from the National Thermal Spray Conference, 921-926, October 7–11, 1996,
... determinations. The repeatability of hardness data is directly related to the density of the coating. This paper deals with the effect of coating characteristics (density) on the reliability of manual and automated hardness measurements. corrosion resistance density microhardness thermal spray coating...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1345-1354, May 8–11, 2000,
... Abstract Frequent reporting of microhardness data for thermal spray coatings testifies to the widespread use of this technique for coatings characterization. However, inadequate reporting of microhardness procedures makes comparisons between published coatings hardness statistics difficult...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 263-268, May 25–29, 1998,
... manufacture, porosity and microhardness. It has been shown that the local coating temperature during directly affects the final coating porosity, grain size, grain morphology and microhardness. The most effective parameter in controlling coating temperature was the coating deposition rate. The Fe0.06wt.% C...
Proceedings Papers

ITSC1996, Thermal Spray 1996: Proceedings from the National Thermal Spray Conference, 463-470, October 7–11, 1996,
.... Coatings, manufactured on stainless steel substrates, were characterized by means of scanning electron microscopy and energy dispersive spectroscopy, x-ray diffraction and Vickers microhardness measurements. Results indicate that the higher the spraying pressure the lower the plasma jet length and particle...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 487-493, May 8–11, 2000,
... cooling nozzles, those parameters varied independently. Flame characteristics were computed using a simple model for propylene as fuel gas. Microstructure investigation as well as oxide content measurements and microhardness were obtained. It appeared that combustion temperature, in the range studied...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 895-904, May 8–11, 2000,
... composition of the sprayed coatings. The as-sprayed coatings possess porosity values ranging between 1% and 2% and microhardness values (HV100) from 1150 to 1550, which are quite similar to values obtained for conventionally sized WC-based coatings. For all the coatings, phase analysis indicated significant...
Proceedings Papers

ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1377-1381, May 8–11, 2000,
... was conducted to assess the efficiency corresponding to the specific use of cryogenic CO2. The main characteristics studied were the microhardness, roughness, porosity, mechanical deformations, morphology and crystallographic structures. Optimising the cooling methods and conditions combined with the process...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 73-81, September 15–18, 1997,
... of porosity of less than 1%. Hardness measurements found that values for the Vickers microhardness number were in the range of 1100-1500. For the wear tests, the test couple consisted of a coated ring (thrust washer type design) rotating against a stationary carbon disk. For each test, the contact load, speed...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 231-238, September 15–18, 1997,
... of the coatings yielded the thickness, bond strength, Knoop microhardness, roughness, deposition efficiency, and porosity. Confirmation testing was accomplished to verify the coating designs. bond strength flame spraying polymers polymer-based coatings porosity Thermal Spray: A United Forum...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 259-266, September 15–18, 1997,
...-alloyed powders could be successfully used to prepare the different inter-layers of functionally graded coatings. The microstructure, density and microhardness changed gradiently in the ZrO 2 /NiCrAlY coatings. The bond strength of ZrO 2 /NiCrAlY coatings with different graded layers was measured. Results...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 707-712, September 15–18, 1997,
... with a decreasing size of lamels. Oxides content in the coatings decreases with an increasing of CaSi 2 and Si content in the composite powders, moreover this effect is more essential in case of CaSi2 addition. Addition of CaSi 2 and Si to Ni-base coatings increases a microhardness from 1900-2000 MPa to 2200-2850...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 901-908, September 15–18, 1997,
... coating microstructure, macro- and microhardness, bond strength, salt spray corrosion, and cyclic compression tests. chromium plating gas turbine applications grinding hardness high velocity oxy-fuel process microstructure tungsten carbide-cobalt wear resistant coatings Thermal Spray...
Proceedings Papers

ITSC1997, Thermal Spray 1997: Proceedings from the United Thermal Spray Conference, 917-923, September 15–18, 1997,
... (TEM), and microhardness measurements. The wear and corrosion characteristics of the two alloy coatings have also been investigated by three body abrasive wear (utilising cross-sectional TEM to examine the worn surfaces) and potentiodynamic corrosion testing respectively. Results from microstructural...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 181-185, May 25–29, 1998,
... of plasma sprayed WC-Co coatings. In this study, their coatings were deposited by the atmospheric plasma spraying. The evaluation of their coatings were carried out by the observation of microstructure, measuring of microhardness values, adhesion strength values and an abrasive wear test. The abrasive wear...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 193-198, May 25–29, 1998,
... Abstract WC-Co and WC-CoCr coatings were deposited with the JP-5000 liquid fuel HP/HVOF system using various thermal spray powder types. The microstructure, microhardness, deposition rate and wear resistance of the coatings were characterized. The results show that these coatings provide...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 299-303, May 25–29, 1998,
... Abstract The tribological behavior of plasma-sprayed coating layers in Co-based alloy was investigated as a function of working distance, gun power, and gas flow. Surface roughness, microhardness, and wear volume were measured for different plasma spraying conditions, wear tests and hardness...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 379-384, May 25–29, 1998,
... to study the morphology of the nanometric particles and the microstructure of the as-sprayed coatings. The properties of various coating materials were characterized by microhardness measurements performed on the polished surface of the cross section. austenitic stainless steel high velocity oxy...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 617-621, May 25–29, 1998,
... Abstract CrNiAlTi, NiCrBSi and WC-Ni coatings have been thermal and plasma sprayed projected over a stainless steel surface in order to protect it against heat and erosion actions encountered in power plant boilers. Their microstructure, porosity and microhardness have been measured. High...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 751-755, May 25–29, 1998,
... Abstract Results of macro- and microhardness investigations of newly developed coatings are presented in this paper. The coatings were produced with flame- and arc spraying technique. The coating structure and hardness is significantly influenced by the spraying method and spraying parameters...
Proceedings Papers

ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1351-1356, May 25–29, 1998,
... Abstract This paper examines the properties of thermal spray coatings produced by electrothermal explosion. Three refractory carbides (TaC, WC, and TiC) were sprayed onto metal substrates then analyzed using FESEM, EPMA, XRD, and microhardness testing. The new spray technique required...