Title:
【発明の名称】構造用材料のクラック検知方法
Document Type and Number:
Japanese Patent JP2840728
Kind Code:
B2
Abstract:
A two-layer structure composite material, by which it is possible to easily detect the occurrence of the cracks occurred in the structural material and to predict the possible destruction of the structural material before it actually occurs. To a structural material, a voltage generating material consisting of a ferroelectric material, a pyroelectric material or a piezoelectric material, is bonded to produce a two-layer structure material, and an electrode is provided for detecting voltage, which is generated owing to impact force.
Inventors:
AKYAMA MORIHITO
WATANABE TADAHIKO
NONAKA KAZUHIRO
WATANABE TADAHIKO
NONAKA KAZUHIRO
Application Number:
JP27614593A
Publication Date:
December 24, 1998
Filing Date:
October 06, 1993
Export Citation:
Assignee:
KOGYO GIJUTSU INCHO
International Classes:
G01N27/20; C04B37/00; G01M5/00; H01L41/09; G01N3/00; G01N3/06; (IPC1-7): H01L41/09; C04B37/00; G01N27/20
Domestic Patent References:
| JP63202030A |
Attorney, Agent or Firm:
Director, Kyushu Institute of Industrial Technology, AIST