Adaptive Control of the Atmospheric Plasma Spray Process for Functionally Graded Thermal Barrier Coatings

<div>Distributions of the NiCrAlY and the ZrO<sub>2</sub> particles for (a) case AB, and (b) case B4. The MPSs are measured in the observation window, 9.5 <svg height="11.2041pt" id="M164" style="vertical-align:-3.42942pt" version="1.1" viewbox="-0.0498162 -7.77468 30.2378 11.2041" width="30.2378pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M531 71V127L115 310L531 494V550L57 335V285L531 71ZM531 -40V10H57V-40H531Z"></path></g><g transform="matrix(.013,0,0,-0.013,11.263,0)"><path d="M556 393C556 426 537 448 514 448C496 448 478 435 471 420C468 414 462 401 466 394C473 382 480 368 480 346C480 268 392 143 338 67H336C329 163 319 253 309 330S286 448 254 448C215 448 160 383 127 337L143 311C167 344 200 373 208 373S222 365 229 320C246 214 264 66 268 -20C219 -83 131 -171 17 -239L25 -261L137 -235C248 -110 273 -79 335 8C384 77 481 215 520 287C544 332 556 363 556 393Z"></path></g><g transform="matrix(.013,0,0,-0.013,22.424,0)"><path d="M531 71V127L115 310L531 494V550L57 335V285L531 71ZM531 -40V10H57V-40H531Z"></path></g></svg> 10.5 cm. For a mass flow rate of 20 g/min for NiCrAlY and ZrO<sub>2</sub>, nearly 886 NiCrAlY and 3181 ZrO<sub>2</sub> particles are in the plasma at any time; the corresponding number of particles in the observation window equal 43 and 148.</div>

Advances in Materials Science and Engineering

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Figure 5

Figure 5: Adaptive Control of the Atmospheric Plasma Spray Process for Functionally Graded Thermal Barrier Coatings 