Composite structure body and method and apparatus for manufacturing thereof

A composite structure body in which on a surface of a substrate is formed a structure body in which crystals of first brittle materials including at least one of ceramics, semiconductors, and metalloids, and crystals and/or microstructures of second brittle materials other than said first brittle materials are dispersed, wherein:

• a part of said structure body becomes an anchor portion biting the substrate surface;
• a portion composed of the crystals of said brittle materials is polycrystalline;
• substantially no boundary layer composed of a glassy substance is present in a boundary face thereof;
• in said polycrystalline portion an average crystallite size is 500 nm or less and a denseness degree of the composite structure body is 70% or more.

A composite structure body which is obtained through the following processes:

• by bombarding fine particles of more than one type of brittle material separately or simultaneously against a surface of a substrate at high velocities, whereby an anchor portion biting said substrate surface is formed;
• the fine particles of said more than one type of brittle material are simultaneously distorted or fractured by impact of the bombardment;
• mutual rejoining of the brittle material fine particles is made through intermediary of a newly generated active surface formed by the distortion or fracture;
• and thereby is formed a structure in which the crystals and/or microstructures of the brittle materials are dispersed above and joined to said anchor portion, and thus the composite structure body is obtained.

A composite structure body which is obtained through the following processes:

• forming composite fine particles by way of a process in which a surface of the fine particles of a brittle material is coated with another brittle material;
• then by bombarding said composite fine particles against a surface of a substrate at high velocities, an anchor portion biting said substrate surface is formed;
• said composite fine particles are simultaneously distorted and fractured by impact of the bombardment;
• mutual rejoining of said composite fine particles is made through intermediary of a newly generated active surface formed by the distortion or fracture;
• and thereby forming a structure body in which crystals and/or microstructures of the brittle materials are dispersed above said anchor portion.

A composite structure body which is obtained through the following processes:

• arranging fine particles of more than one type of brittle material on a surface of a substrate;
• exerting mechanical impact to the brittle material fine particles to form an anchor portion biting said substrate surface;
• simultaneously said brittle material fine particles are deformed or fractured by the mechanical impact;
• mutual rejoining of said fine particles is made through intermediary of a newly generated active surface formed by the distortion or fracture;
• and thereby forming a structure body composed of structures in which crystals and/or microstructures of the more than one type of brittle material are dispersed above said anchor portion.

A composite structure body which is obtained through the following processes:

• forming composite fine particles by way of a process in which a surface of fine particles of a brittle material is coated with another brittle material;
• then arranging said composite fine particles on a surface of a substrate;
• an anchor portion biting said substrate surface is formed by exerting mechanical impact to the composite fine particles;
• said composite fine particles are simultaneously deformed or fractured by the mechanical impact;
• mutual rejoining of said composite fine particles is made through intermediary of a newly generated active surface formed by the distortion or fracture;
• and thereby forming structure body composed of the structure in which crystals and/or microstructures of the brittle materials are dispersed above said anchor portion.