Wetting of molten cerium on typical carbon materials (graphite, CVD-diamond and NWCNT) and molten Cu–Ce alloys on graphite at 950 °C

Diamonds brazing with a novel Cu35Ni35Cr10Fe10Sn10 high‐entropy alloy filler

“…The graphitization degree of the diamond surface was checked by laser Raman spectroscopy (Renishaw-inVia). The wetting behavior of the HEA filler on the graphite surface was carried out in a vacuum environment at 1000 • C. According to previous works studying the wettability of filler alloys on the diamond surface, [22][23][24] it was widely believed that the energy difference between diamond and graphite is small. In terms of wettability, the behavior of spreading, soaking, and dissolution, and the reaction products to the filler alloy, diamond, and graphite are quite comparable.…”

1000 °C High-Temperature Wetting Behaviors of Molten Metals on Laser-Microstructured Metal Surfaces

“…However, only few literature studies focused on the wettability of molten metals at high temperatures (e.g., 1000 °C) compared with the wettability studies on more common liquids under more gentle conditions, such as water and low-melting-point liquid metals at room temperature. − Various simulations have been performed to predict the probable wetting behaviors of molten metals on various substrates, − but practical observations remain scarce due to the availability of materials and the strict environmental requirements. Among the restricted experimental work, researchers prefer to improve the wettability of molten metals with several kinds of solid surfaces for better performance in welding, brazing, metal-based composite formation, and lithium battery preparation. − ,− For example, Wu et al proposed a method to enhance the wettability of a kind of room-temperature gallium-based liquid metal on polyacrylate surfaces for a better connection, Fan et al modified the wetting and spreading behaviors of Sn on the SiC surface by changing the content of the alloying element Cr, Li et al enhanced the wettability of molten high manganese steel with Ni–Co-coated ZTA ceramic particles to strengthen the abrasive wear resistance of the composites, and Sui et al studied the wetting ability of molten Ce and Cu–Ce alloy on various carbon materials. Liu et al introduced ultrasonic power to improve the wetting of the Zn filler on the TC4 alloy and further strengthen the mechanical properties of the brazed joint, and Griffith et al investigated the effect of droplet size on the wetting behaviors of molten Sn on copper substrates for better performance of microsolder joints.…”

“…On the other hand, limited publications studied the effect of surface microstructures on the wetting behaviors of molten metals on substrates at high temperatures, while most of them concerned about the composition of the melts and the substrate surfaces or the periphery conditions. − ,,− , Lai et al found that a microporous copper substrate enhanced the wetting of molten Sn, while Zhou et al structured the steel mold surfaces to weaken the adhesion of the molten and resolidified Al alloys with the mold by preventing their full wetting. Liu et al discussed the effect of laser-textured stainless steel surface structures on the wetting and spreading behaviors of the Al–Si alloy in the presence of flux, and Lin et al observed that rough silica surfaces improved the spreading of the Sn–Ag–Ti alloy.…”

“…Cerium (Ce) is one of the most common rare earth metal materials and is widely used in engineering. , Due to its complicated electronic structure and unique phase changes, Ce has also raised intense interest in recent years . Normally, a refractory metal such as tantalum (Ta) is chosen to be the crucible material during the smelting process of Ce for its high melting point and chemical durability.…”

“…Among the restricted experimental work, researchers prefer to improve the wettability of molten metals with several kinds of solid surfaces for better performance in welding, brazing, metalbased composite formation, and lithium battery preparation. 4−7,26−50 For example, Wu et al 16 proposed a method to enhance the wettability of a kind of room-temperature gallium-based liquid metal on polyacrylate surfaces for a better connection, Fan et al 28 modified the wetting and spreading behaviors of Sn on the SiC surface by changing the content of the alloying element Cr, Li et al 33 enhanced the wettability of molten high manganese steel with Ni−Co-coated ZTA ceramic particles to strengthen the abrasive wear resistance of the composites, and Sui et al 36 studied the wetting ability of molten Ce and Cu−Ce alloy on various carbon materials. Liu et al 40 mechanical properties of the brazed joint, and Griffith et al 49 investigated the effect of droplet size on the wetting behaviors of molten Sn on copper substrates for better performance of microsolder joints.…”