intermetallic compound
C2 / Very low frequencyHighly technical / Scientific / Specialized academic
Definition
Meaning
A chemical compound consisting of two or more metallic elements in a fixed proportion, with a crystal structure different from its constituent metals.
A material formed by the ordered bonding of different metal atoms, often exhibiting properties like high melting points, hardness, and brittleness, making them useful in specific engineering and structural applications.
Linguistics
Semantic Notes
This is a term of art in materials science, metallurgy, and solid-state chemistry. It describes a distinct phase, not a simple mixture (alloy). Often implies ordered atomic arrangement and specific stoichiometry.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or orthographic differences. Pronunciation of 'intermetallic' may slightly vary.
Connotations
Identical technical connotations.
Frequency
Used with identical rarity and specificity in both scientific communities.
Vocabulary
Collocations
Grammar
Valency Patterns
The [Metal A] and [Metal B] react to form an intermetallic compound.An intermetallic compound of [Metal A] and [Metal B] was identified.Researchers synthesized a new intermetallic compound.Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Virtually never used.
Academic
Exclusively used in materials science, metallurgy, chemistry, and engineering research papers and textbooks.
Everyday
Never used.
Technical
Core term for describing specific phases in metal systems, crucial in materials design for aerospace, coatings, and high-temperature applications.
Examples
By Part of Speech
verb
British English
- The metals intermetallically compound at high temperatures.
American English
- The two metals can compound to form an intermetallic phase.
adverb
British English
- The atoms are arranged intermetallically.
American English
- The two metals bonded intermetallically.
adjective
British English
- The intermetallic phase was analysed using X-ray diffraction.
- They studied the alloy's intermetallic properties.
American English
- The research focused on intermetallic bonding characteristics.
- We observed an intermetallic layer at the interface.
Examples
By CEFR Level
- Some very hard materials are intermetallic compounds.
- An intermetallic compound is not a simple mixture of metals.
- The new turbine blade coating utilises a nickel-aluminide intermetallic compound for superior heat resistance.
- Diffraction patterns confirmed the presence of a stable intermetallic compound at the joint interface.
Learning
Memory Aids
Mnemonic
Think INTERnational METALlic relations: different metal atoms forming a distinct, ordered alliance (compound), not just mixing.
Conceptual Metaphor
An architectural lattice where specific, different metal atoms occupy fixed positions, like a perfectly ordered brick wall with alternating, predetermined brick types.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate word-for-word as 'интерметаллический состав' or 'интерметаллическая смесь'.
- The standard accepted translation is 'интерметаллид' (intermetallid) or 'интерметаллическое соединение'.
- Avoid confusing it with a simple 'сплав' (alloy). An интерметаллид is a specific type of ordered alloy.
Common Mistakes
- Pronouncing it as 'inter-metalic' (four syllables) instead of 'inter-me-tal-lic' (five syllables).
- Using it interchangeably with 'alloy' (an alloy can be a solid solution or an intermetallic compound).
- Spelling as 'intermetalic' (missing one 'l').
Practice
Quiz
What is a defining characteristic of an intermetallic compound?
FAQ
Frequently Asked Questions
Not exactly. An 'alloy' is a broader term for a metallic substance composed of two or more elements. An intermetallic compound is a specific type of alloy with a defined chemical formula and an ordered atomic structure, distinguishing it from solid solution alloys where atoms are randomly mixed.
Their ordered crystal structure restricts the movement of dislocations (defects that allow metals to deform plastically). This makes them strong and hard but also prone to brittle fracture under stress.
They are used in high-performance applications requiring strength at high temperatures, such as in turbine blades (e.g., nickel aluminides), protective coatings, magnetic materials (e.g., neodymium magnets contain Nd₂Fe₁₄B), and some solders.
Yes. While binary (two-metal) compounds like TiAl are common, ternary (three-metal) and more complex intermetallic compounds also exist and are an active area of research for tuning specific properties.