Definition
A hard, dense, corrosion-resistant metallic element (chemical symbol Ta, atomic number 73) with a very high melting point, used in aviation primarily in electronic components such as tantalum capacitors and in certain high-temperature alloys for engine and turbine parts.
Plain English
A tough, heat-resistant metal that does not corrode easily. In aircraft, it shows up mostly inside electronic parts and in metal mixes used for components that have to handle very high heat.
Context Anchor
Seen in aircraft maintenance manuals, component specifications, and aircraft electronics discussions, especially when identifying the material used in a capacitor or other small electrical part.
Derivation
Named after Tantalus, a figure in Greek mythology condemned to stand in water that always receded when he tried to drink. Early chemists chose the name because the metal stubbornly resisted absorbing acid — it sat in acid the way Tantalus sat in water, untouched. The name captures the metal's defining property: extreme chemical resistance.
Why Pilots Care
Tantalum capacitors provide stable capacitance and long service life in critical circuits, reducing the risk of intermittent failures in instruments and radios that pilots rely on for safe flight.
Example Sentence 1
The avionics unit uses tantalum capacitors because they hold up well in the heat and vibration of the cockpit environment.
Example Sentence 2
Aircraft manufacturers specify tantalum capacitors in the power supply boards because they tolerate the wide temperature swings encountered at altitude.