Abstract
Ceramics and ceramic-reinforced metal matrix composites (CMMCs) demonstrate high wear resistance, excellent chemical inertness, and exceptional properties at elevated temperatures. These characteristics are suitable for their utilization in biomedical, aerospace, electronics, and other high-end engineering industries. The aforementioned performances make them difficult to fabricate via conventional manufacturing methods, requiring high costs and energy consumption. To overcome these issues, laser additive manufacturing (LAM) techniques, with high-power laser beams, were developed and extensively employed for processing ceramics and ceramic-reinforced CMMCs-based coatings. In respect to other LAM processes, laser melting deposition (LMD) excels in several aspects, such as high coating efficiency and lower labor cost. Nevertheless, difficulties such as poor bonding between coating and substrate, cracking, and reduced toughness are still encountered in some LMD coatings. In this article, we review recent developments in the LMD of ceramics and CMMCs-based coatings. Issues and solutions, along with development trends, are discussed and summarized in support of implementing this technology for current industrial use.
Highlights
Published: 4 March 2021Ceramics and ceramic-reinforced metal matrix composites (CMMCs)-based coatings exhibit enhanced properties, including wear resistance, modulus and strength, chemical inertness, and properties at high operating temperatures [1,2,3,4]
The results showed that the laser scanning speed has a substantial influence on the macroscopic defects, microstructure characteristics, and mechanical properties
The results showed that the laser power has a great impact on microstructure evolution, mechanical characteristics, and retainment of HAP coatings
Summary
Muhammad Arif Mahmood 1,2 , Alexandra Bănică 1,3 , Carmen Ristoscu 1 , Nicu Becherescu 4 and Ion N. Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 02002 Bucharest, Romania
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