Method for adhering/separating bodies to be adhered, and metal composite material

A bolt (50) and the threaded portion (61) of a nut (60) are heated. Thus, when a metal paste (10) is heated, first metallic particles (11) are melted. After the heating is completed the first metal cools naturally and solidifies to form a first metal phase (12). Consequently, a first metal member (20), wherein second metal particles (21) are included in the first metal phase (12), is generated. Then, the bolt (50) and the threaded portion (61) of the nut (60) are adhered to each other with the first metal member (20) therebetween. Next, the bolt (50) and the nut (60) are reheated. Consequently, the first metal and the second metal react and generate an intermetallic compound member (30). Next, the bolt (50) and the nut (60) are separated, with the intermetallic compound member (30) as the separation portion. 加热螺栓(50)和螺母(60)的螺纹部(61)。由此，加热金属糊料(10)时，第1金属粒(11)熔融。加热结束后，第1金属自然冷却、凝固，形成第1金属相(12)。其结果，生成在第1金属相(12)中包含第2金属粒(21)的第1金属部件(20)。然后，介由第1金属部件(20)粘附螺栓(50)和螺母(60)的螺纹部(61)。接着，再次加热螺栓(50)和螺母(60)。其结果，第1金属与第2金属反应而生成金属间化合