Titanium-based composite material, method for producing the same and engine valve

A titanium-based composite material characterized in that it comprises:

• a matrix of a titanium alloy as a major component, containing 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.1-0.5% by weight of oxygen (O);
• and
• rare-earth element compound particles dispersed in the matrix in the amount of 3% by volume or less.

A titanium-based composite material characterized in that it comprises:

• a matrix of a titanium alloy as a major component, containing 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.1-0.5% by weight of oxygen (O);
• titanium compound particles dispersed in the matrix in the amount of 1-10% by volume;
• and rare-earth element compound particles dispersed therein in the amount of 3% by volume or less.

A titanium-based composite material comprising:

• a matrix of a titanium alloy as a major component, comprising 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si);
• and
• titanium compound particles dispersed in the matrix in the amount of 1-10% by volume, wherein said matrix contains oxygen in an amount/of0.15-0.4% by weight.

An engine valve comprising a titanium-based composite material, said composite material comprising:

• a matrix of a titanium alloy as a major component, comprising 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.15-0.5% by weight of oxygen (O);
• and titanium compound particles dispersed in the matrix in the amount of 1-10% by volume or less.

An engine valve comprising a titanium-based composite material, said composite material comprising:

• a matrix of a titanium alloy as a major component, comprising 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.1-0.5% by weight of oxygen (O);
• and
• rare-earth element compound particles dispersed in the matrix in the amount of 3% by volume or less.

An engine valve comprising a titanium-based composite material, said composite material comprising:

• a matrix of a titanium alloy as a major component, comprising 3.0-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.1-0.5% by weight of oxygen (O);
• and titanium compound particles dispersed in the matrix in the amount of 1-10% by volume and rare-earth element compound particles dispersed therein in the amount of 3% by volume or less.

A titanium-based composite material comprising:

• a matrix of a titanium alloy as a major component, comprising 3.07-7.0% by weight of aluminum (Al), 2.0-6.0% by weight of tin (Sn), 2.0-6.0% by weight of zirconium (Zr), 0.1-0.4% by weight of silicon (Si) and 0.1-0.5% by weight of oxygen (O);
• and
• titanium compound particles dispersed in the matrix in the amount of 1-10% by volume, whereins said titanuium compound particles have an average aspect ratio of 1-40%, and have an average particle diameter of 0.5-50 μm.

A composite comprising a titanium alloy having titanium compound particles dispersed therein in an amount of 1-10% by volume, wherein said titanium alloy comprises titanium, 3-7% by weight aluminum, 2-6% by weight tin, 2-6% by weight zirconium, 0.1-0.4% by weight silicon and 0.15-0.5% by weight oxygen.

A composite comprising a titanium alloy having rare-earth element compound particles dispersed therein in an amount of 3% by volume or less, wherein said titanium alloy comprises titanium, 3-7% by weight aluminum, 2-6% by weight tin, 2-6% by weight zirconium, 0.1-0.4% by weight silicon and 0.1-0.5% by weight oxygen.

A composite comprising a titanium alloy having titanium compound particles dispersed therein in an amount of 1-10% by volume and rare-earth element compound particles dispersed therein in an amount of 3% by volume or less, wherein said titanium alloy comprises titanium, 3-7% by weight aluminum, 2-6% by weight tin, 2-6% by weight zirconium, 0.1-0.4% by weight silicon and 0.1-0.5% by weight oxygen.

A composite comprising a titanium alloy having titanium compound particles dispersed therein in an amount of 1-10% by volume, wherein said titanium alloy comprises titanium, 3-7% by weight aluminum, 2-6% by weight tin, 2-6% by weight zirconium, 0.1-0.4% by weight silicon and 0.1-0.5% by weight oxygen, wherein said titanium compound particles have an average aspect ratio of 1-40, and have an average particle diameter of 0.5-50 μm.