CELL STACK OF FUEL CELL

To provide an assembly capable of suppressing the occurrence of cracks in a glass part.SOLUTION: An assembly is provided with a manifold 200 and a glass part 300. The glass part 300 includes: an interface region 300a within 5 μm in depth from the surface 200S of the manifold 200; and an internal region 300b over 5 μm in depth from the surface 200S of the manifold 200. In a cross-sectional view, the interface region 300a and the internal region 300b each include rod-shaped crystal grains having an aspect ratio of 3 or more. The average orientation angle of the rod-shaped crystal grains included in the interface region 300a is 60 degrees or more and 120 degrees or less. The standard deviation of orientation angles of the rod-shaped crystal grains included in the internal region 300b is greater than the standard deviation of orientation angles of the rod-shaped crystal grains included in the interface region 300a.SELECTED DRAWING: Figure 5 【課題】ガラス部にクラックが発生することを抑制可能な接合体を提供する。【解決手段】接合体は、マニホールド２００とガラス部３００とを備える。ガラス部３００は、マニホールド２００の表面２００Ｓから５μｍ以内の界面領域３００ａと、マニホールド２００の表面２００Ｓから５μｍ超の内部領域３００ｂとを含む。界面領域３００ａ及び内部領域内部領域３００ｂそれぞれは、断面視において、３以上のアスペクト比を有する棒状結晶粒子を含む。界面領域３００ａに含まれる棒状結晶粒子の平均配向角度は、６０度以上１２０度以下である。内部領域３００ｂに含まれる棒状結晶粒子の配向角度の標準偏差は、界面領域３００ａに含まれる棒状結晶粒子の配向角度の標準偏差より大きい。【選択図】図５