Abstract: Various novel heat exchange components which are designed and/or configured to effectively and efficiently dissipate thermal energy (heat) away from a heat source are described. The heat exchange component structures may be a composite formed of two or more distinct types of materials including a thermally conductive material and a solid state (SS) Martensitic transformation (MT) phase change material (PCM). The thermally conductive material may be configured so as to form or provide for: (i) a heat receiving section configured to be in contact with a heat source so as to receive thermal energy from the heat source, and (ii) a thermal energy spreading section configured to pull thermal energy away from the heat receiving section and distribute it into and/or throughout the entire the heat exchange structure, especially, into and/or through the SS MT PCM.