Scaleable stagnation-flow reactors for uniform materials deposition: Application to combustion synthesis of diamond

Abstract
We describe two inherently scaleable geometries for chemical‐vapor‐deposition and heat‐transfer processes that are based on stagnation flows. The ‘‘coflow’’ and ‘‘trumpet‐bell’’ designs result in radially uniform fluxes to surfaces and they optimize the use of reagents. Using a trumpet‐bell burner, we have grown uniform films of diamond from a substrate‐stabilized flat flame of C2H2/H2/O2.