Figure 14. SEM images from the cross-section of a EWCVD-formed SiC joint. resistively heated wires and base tube temperature as measured by a thermocouple are monitored and used for feedback control of the deposition process. Figures 12 and 13 provide images of the in- situ joining process and a welded sample upon removal from the chamber, while Figure 14 shows a high-density cross-section of the EWCVD formed joint. At present, homogenously joined tube samples are being prepared to provide to Oak Ridge National Laboratory (ORNL) for an in-house developed technique for burst testing (introduction of gas into the internal tube volume and increasing the pressure until the welded joint fails) and evaluation of the hermiticity of the homogenous joint. www. sampe.org MAY JUNE 2023 | SAMPE JOURNAL | 25http://www.frenchoil.com http://www.sampe.org