du Merac Marc Rubat, Bram Martin, Malzbender Jürgen, Ziegner Mirko, Rasinski Marcin, Guillon Olivier
Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany.
Geomaterialwissenschaft, Institut für Angewandte Geowissenschaften, Technische Universität Darmstadt, 64287, Darmstadt, Germany.
Sci Rep. 2018 Oct 23;8(1):15644. doi: 10.1038/s41598-018-33919-5.
Transparent polycrystalline ceramics have the potential to enable applications no other materials can, but to do so their strength and toughness must be improved. However, surface strengthening treatments like those used for glasses have so far remained elusive. Here for the first time, we report on engineering unprecedented surface compression, of the magnitude achieved for ion-exchange strengthened glasses (~750 MPa) in transparent ceramics. This was achieved by applying functional, low thermal-expansion yttria coatings onto yttria-stabilized zirconia substrates and thermally treating. In some instances, the treatment more than doubled the fracture toughness while simultaneously increasing light transmittance.
透明多晶陶瓷有潜力实现其他材料无法实现的应用，但要做到这一点，必须提高其强度和韧性。然而，迄今为止，像用于玻璃的那些表面强化处理方法仍难以实现。在此，我们首次报道了在透明陶瓷中实现了前所未有的表面压缩，其压缩量达到了离子交换强化玻璃所达到的量级（约750兆帕）。这是通过在氧化钇稳定的氧化锆衬底上涂覆功能性低热膨胀氧化钇涂层并进行热处理来实现的。在某些情况下，这种处理使断裂韧性提高了一倍多，同时还提高了透光率。
