Alloys, bond coatings, and components including same

A bond coating composition comprising:

• an alloy including:
• between approximately 20 atomic percent and approximately 30 atomic percent titanium (Ti);
• between approximately 35 atomic percent and approximately 55 atomic percent aluminum (Al);
• at least one of:
• between approximately 1 atomic percent and approximately 10 atomic percent molybdenum (Mo);
• between approximately 1 atomic percent and approximately 7 atomic percent chromium (Cr);
• between approximately 1 atomic percent and approximately 20 atomic percent silicon (Si);
• or
• between approximately 1 atomic percent and approximately 5 atomic percent hafnium (Hf);
• and
• a balance of niobium (Nb).

A component comprising:

• a substrate formed from a first material;
• and
• a bond coating deposited over the substrate, the bond coating formed from an alloy including:
• between approximately 20 atomic percent and approximately 30 atomic percent titanium (Ti);
• between approximately 35 atomic percent and approximately 55 atomic percent aluminum (Al);
• at least one of:
• between approximately 1 atomic percent and approximately 10 atomic percent molybdenum (Mo);
• between approximately 1 atomic percent and approximately 7 atomic percent chromium (Cr);
• between approximately 1 atomic percent and approximately 20 atomic percent silicon (Si);
• or
• between approximately 1 atomic percent and approximately 5 atomic percent hafnium (Hf);
• and
• a balance of niobium (Nb),
• wherein the bond coating includes an outer portion formed as aluminum oxide (Al2O3).