Nanocrystalline eta-Cu6Sn5 alloy powders were prepared by high energy ball-milling. Lithium ions can be electrochemically inserted into Cu6Sn5 electrodes, alloying with Sn to form LixSn alloys. Simultaneously, an inactive Cu matrix is produced, which could buffer the volume expansion of the ...
By electroplating arrays of large numbers of 〈111〉 oriented and nanotwinned Cu pads and by electroplating the Sn2.3Ag solder on the pads, we form η-Cu6Sn5 in the reflow at 260°C for 1min. The η-Cu6Sn5 showed a highly preferential growth along the 〈0001〉 direction. As reflow ...