复杂形状陶瓷的可编程快速制造

Programmable and rapid fabrication of complex-shape ceramics.

作者信息

Shan Yao, Li Xuemu, Zhao Wanjun, Yang Xiaodan, Wang Yuanyi, Zhang Zhuomin, Liu Shiyuan, Xu Xiaote, Yang Zhengbao

机构信息

Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Hong Kong, China.

Department of Chemistry, Purdue University, Indiana, USA.

出版信息

Nat Commun. 2024 Nov 18;15(1):9973. doi: 10.1038/s41467-024-54393-w.

DOI:10.1038/s41467-024-54393-w

PMID:39557886

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11574009/

Abstract

Shaping of ceramics is crucial. Current techniques cannot easily and rapidly shape ceramics without weakening their properties, especially for piezoceramics. We present an ultrafast ceramic shaping method that leverages thermomechanical fields to deform and sinter ceramic powder compacts into complex-shaped ceramics. The shape-forming process hinges on: (1) the implementation of a precise thermal field to activate optimal deformability, and (2) the application of sufficient mechanical loads to guide deformation. We employ a programmable carbon-felt Joule heater that concurrently function as mechanical carriers, effectively transferring applied loads to the ceramic powder compacts. Using this ultrafast shaping and sintering (USS) method, we fabricate barium titanate (BT) piezoceramics in twisted shape, arch shape and with micropatterns. The USS method is energy-friendly (requiring approximately 1.06 kJ mm) and time-efficient (in several minutes level). Overall, the USS method offers an effective solution for shaping ceramics and extends them to 3D geometries with enhanced versatility.

摘要

陶瓷成型至关重要。目前的技术在不削弱陶瓷性能的情况下，难以轻松快速地对其进行成型，尤其是对于压电陶瓷而言。我们提出了一种超快陶瓷成型方法，该方法利用热机械场将陶瓷粉末压坯变形并烧结成复杂形状的陶瓷。形状形成过程取决于：（1）实施精确的热场以激活最佳可变形性，以及（2）施加足够的机械载荷以引导变形。我们采用了一种可编程的碳毡焦耳加热器，它同时作为机械载体，有效地将施加的载荷传递到陶瓷粉末压坯上。使用这种超快成型和烧结（USS）方法，我们制造出了扭曲形状、拱形形状以及带有微图案的钛酸钡（BT）压电陶瓷。USS方法对能源友好（大约需要1.06 kJ mm）且效率高（在几分钟的时间范围内）。总体而言，USS方法为陶瓷成型提供了一种有效的解决方案，并将其扩展到具有更高通用性的三维几何形状。