<p>In this study, two functional coating materials (Al₂O₃ and AlCrN) with enhanced wear and oxidation resistance are deposited via thermal spraying onto STS304 substrates. The objective is to investigate the interactions between premixed stoichiometric C1–C4 alkanes flames and heated solid walls over a temperature range of 473 K to 873 K within a narrow-channel combustor. The flame propagation characteristics for different alkane fuels are characterized through measurements of flame quenching distance, flame morphology, flame anchoring position, and OH fluorescence intensity. Results show that higher wall temperatures and greater fuel reactivity both contribute to a reduction in quenching distance, and the ranking by quenching distance is C₂H₆&gt;C₃H₈≈n-C₄H₁₀&gt;CH₄. Different wall surfaces induce distinct chemical effects on near-wall OH distribution, with the highest under Al₂O₃-coated wall, followed by STS3014 wall, and the lowest for AlCrN-coated wall, which is consistent with the order of increasing quenching distance. Flame anchoring positions descend with increasing channel gaps and wall temperatures. Under identical conditions, flame position follows the order: Al₂O₃&gt;STS304&gt;AlCrN, while minimum channel gaps for maintaining flame propagation exhibits an inverse relationship. In summary, coating the chamber wall with Al₂O₃ and AlCrN does not significantly deteriorate the flame characteristics, suggesting their potential applicability for wall surface modification of critical moving and stationary components in micro-power systems to weak adverse wall effects. Also, the surface roughness effect should be considered in the design of coated walls.</p>