The physicochemical properties of porous Ti₂AlC and Ti₃SiC₂ MAX phase compounds with controlled porosity and grain size obtained by powder metallurgy techniques was studied in depth in order to access their suitability of applications such as catalytic devices on vehicles, heat exchangers or impact resistant structures. The study was performed on isostatic consolidated samples with different amount (20–60 vol%) and size of space holder (250–1000 µm) and in samples without space holder. Oxidation tests were performed at different temperatures for each material depending on their maximum service temperature. In order to understand the oxidation mechanism, oxidation kinetics were analysed to determine the influence of size and amount of porosity in each case. In addition, the microstructure and composition of the oxide layers formed after the tests were analysed by scanning electron microscopy (SEM). Electrical and thermal conductivity where studied at room temperature and at temperature up to 1000 °C. The effect of pore size and cell wall thickness is discussed. Permeability of foams was also measured. The effect of micro porosity and macro porosity on permeability is discussed. The coefficient of thermal expiation was also measured for all foams produced. It is established that these porous MAX phases have suitable properties for their use as catalytic substrates, heat exchanges, high temperature filters or volumetric solar receivers.

多孔Ti ₂ AlC和Ti ₃ SiC ₂的理化性质通过粉末冶金技术获得的具有控制的孔隙率和粒度的MAX相化合物进行了深入研究，以获取其适用性，例如车辆上的催化装置，热交换器或耐冲击结构。该研究是在等静压固结样品中进行的，这些样品具有不同的数量（20–60 vol％）和空间保持器的尺寸（250–1000 µm），以及没有空间保持器的样品。根据每种材料的最高使用温度，在不同的温度下进行了氧化测试。为了理解氧化机理，分析了氧化动力学以确定每种情况下孔隙大小和孔隙量的影响。另外，通过扫描电子显微镜（SEM）分析测试后形成的氧化物层的微观结构和组成。在室温和高达1000°C的温度下研究电导率和导热率。讨论了孔径和孔壁厚度的影响。还测量了泡沫的渗透性。讨论了微观孔隙度和宏观孔隙度对渗透率的影响。还测量了所产生的所有泡沫的热膨胀系数。可以确定的是，这些多孔MAX相具有适合用作催化基质，热交换，高温过滤器或体积太阳能接收器的特性。还测量了所产生的所有泡沫的热膨胀系数。可以确定的是，这些多孔MAX相具有适合用作催化基质，热交换，高温过滤器或体积太阳能接收器的特性。还测量了所产生的所有泡沫的热膨胀系数。可以确定的是，这些多孔MAX相具有适合用作催化基质，热交换，高温过滤器或体积太阳能接收器的特性。