Aluminum bronze alloy and sliding member using said alloy

An aluminum bronze alloy comprising copper (Cu), aluminum (Al), nickel (Ni), iron (Fe), silicon (Si), and inevitable impurities,

• wherein, with respect to a total weight,
• Al is 9.5% by weight or more and 10.5% by weight or less;
• Ni is 6.0% by weight or more and 8.0% by weight or less;
• Fe is 4.0% by weight or more and 6.0% by weight or less;
• Si is 1.0% by weight or more and 2.0% by weight or less;
• and
• the balance is Cu and the inevitable impurities, and
• the aluminum bronze alloy has a structure composed of an α phase, a coarse Fe—Si-based intermetallic compound having a shape with a first thickness along a first axis and a second thickness along a second axis that is greater than the first thickness, in which the first thickness is 1 μm or longer, an infinitesimal κ phase different from the Fe—Si-based intermetallic compound having a first length and a second length that is longer than the first length in which the first length is less than 1 μm, and a trace amount of inevitable phases;
• the coarse Fe—Si-based intermetallic compound accounts for 4% or higher and 14% or lower with respect to an entire structure in terms of area ratio in a cross-section of the metal;
• and
• the infinitesimal k phase is formed dottedly or linearly and dispersed in the entire structure.