in-va
Definition
- Noun:
- Invar: An alloy of iron and nickel, characterized by an extremely low coefficient of thermal expansion. It is primarily used in the manufacture of precision measuring instruments, scientific apparatus, and clock pendulums.
Usage Examples
- Noun:
- Invar là vật liệu quan trọng để chế tạo thước đo chính xác. (Invar is an important material for making precision measuring rulers.)
- Con lắc đồng hồ cao cấp thường được làm bằng invar. (High-quality clock pendulums are often made of invar.)
Advanced Usage
- Technical Context: In scientific and engineering contexts, "invar" refers specifically to the alloy (typically 64% iron, 36% nickel) prized for its dimensional stability across a range of temperatures.
- Bộ phận này cần làm bằng invar để tránh giãn nở nhiệt. (This component needs to be made of invar to avoid thermal expansion.)
Variants and Related Words
- Hợp kim invar (n): Invar alloy.
- Hợp kim invar có độ giãn nở rất thấp. (The invar alloy has a very low expansion rate.)
Synonyms
- Low-expansion alloy: An alloy with minimal thermal expansion.
- Nickel-iron alloy: A general term for alloys of nickel and iron.
Notes on Usage
- "Invar" is a technical, uncountable noun. It is typically used without an article when referring to the material in general (e.g., "made of invar"). The word is a trademark that has become a generic term.