A brazed joint can be satisfactorily made on an article made of copper.

Explanation:
A brazed joint is a type of joint made by joining two or more pieces of metal using a filler metal that has a lower melting point than the base metals being joined. The filler metal, known as brazing alloy, is usually a copper-based material that melts and flows between the joint surfaces when heated.

Advantages of Brazing:
1. Strong Joint: Brazed joints are typically stronger than other types of joints, such as soldered or welded joints. This is because the filler metal used in brazing has a higher strength than the base metals being joined.

2. Excellent Sealing: Brazing provides excellent sealing properties, making it suitable for applications where air or fluid tightness is required. The filler metal flows into any gaps or voids between the joint surfaces, creating a tight seal.

3. Versatility: Brazing can be used to join a wide range of metals and alloys, including copper, brass, bronze, steel, and even some non-metallic materials. This makes it a versatile joining method in various industries.

Why Copper is Suitable for Brazing:
Copper is an excellent material for brazing due to its unique properties. Here are some reasons why copper is suitable for brazing:

1. Low Melting Point: Copper has a relatively low melting point compared to many other metals. This allows the brazing alloy to melt and flow easily, ensuring a strong joint without causing damage to the base metal.

2. Good Thermal Conductivity: Copper has excellent thermal conductivity, allowing heat to distribute evenly during the brazing process. This helps in achieving uniform heating and prevents localized overheating or distortion of the joint.

3. Compatibility with Filler Metals: Copper exhibits good compatibility with a wide range of brazing alloys. The filler metals used for brazing copper are typically copper-based, which ensures good wetting and bonding between the joint surfaces.

4. Corrosion Resistance: Copper has excellent corrosion resistance, making it suitable for applications where the joint needs to withstand harsh environments or exposure to moisture. The brazed joint formed on copper will also exhibit similar corrosion resistance.

Therefore, due to the low melting point, good thermal conductivity, compatibility with filler metals, and corrosion resistance, copper is an ideal material for making brazed joints.