I agree, it doesn't sound much like "plasma" to me, which is why I put it in quotation marks or used the term "plasma-like" because, while the people doing the research use the term plasma, I don't think it's suitable. But it is the term commonly used for this technology.
The only thing it common that the process has with plasma is that you are combining 2 hot materials and producing a gaseous state of the two homogenously mixed.