摘要:

AbstractA technique of direct strip casting and rapid solidification has been used to produce high capacity melts of silver based powder alloys for dental amalgam. The properties of the amalgam were compared with those of conventional lathe cut or spherical powder amalgams. It was found that by optimising the size distribution and heat treatment, properties can be obtained to meet or excel international standards. The high cooling rate during rapid solidification produces a chemically homogeneous amalgam and its flake morphology gives superior workability in the mouth. The dimensional change (contraction) of in situ fillings is much reduced.MST/1520

ISSN:0267-0836    

DOI:10.1179/mst.1992.8.7.645

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

摘要:

AbstractA technique has been developed in which transient potential drop signals are obtained during initial and anhysteretic magnetisation. From these, a deviation curve can be obtained that reflects the absolute stress not only in small test specimens, but also in large steel structures. However, further investigations and experimental work are required before an instrument for reliable measurement can be of practical value. The use of deviation curves to indicate structural changes during fatigue, before cracks develop, may also be a possible application of the new technique.MST/1664

ISSN:0267-0836    

DOI:10.1179/mst.1992.8.7.649

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

ISSN:0267-0836    

DOI:10.1179/mst.1992.8.7.652

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor