Influence of fabric geometrical parameters,including the number of filling yarns per 10 cm,yarn twist and fiber type,on bonding of the fabric reinforced cement composites is studied by fabric pull-out test and SEM mic...Influence of fabric geometrical parameters,including the number of filling yarns per 10 cm,yarn twist and fiber type,on bonding of the fabric reinforced cement composites is studied by fabric pull-out test and SEM microstructure analysis.The results show that the bonding strength increase with the increase of the number of filling yarns per 10 cm in the range of this study.But the influence of fabric count on the interfacial bonding is dual and there is a critical value.The twist of yarns has a little effect on the bonding strength and interfacial bonding behaves of nylon fabric reinforced cement composites.There is an optimum twist range.Within this range,the bonding strength increase slowly with the increase of yarn twist.Beyond this range,it is versus.The bonding strength is strongly affected by the fabric character.The bonding between the nylon fiber fabric and cement is good;that of between glass fiber fabric and cement is moderate and that of between the carbon fiber fabric and cement is poor.展开更多
In order to improve the bonding strength between piston alloys and cast iron ring of aluminum piston with reinforced cast iron ring,the different methods of the surface treatments(shot blasting and sand blasting) to t...In order to improve the bonding strength between piston alloys and cast iron ring of aluminum piston with reinforced cast iron ring,the different methods of the surface treatments(shot blasting and sand blasting) to the cast iron ring are experimented.The optical micrograph shows that an intermetallic layer and a ligulate shaped structure are formed between piston alloys and cast iron base ring.After sand blasting treatment,the ring surface is non-metal shiny,matte-like and has no obvious pits.The intermetallic layer thickness formed between piston alloys and cast iron is thinner and more equally distributed after sand blasting to the ring.The content of the graphite distributed the interfacial zone after the shot blasting treatment is little.With the increase of time by sand blasting,the hardness starts to slightly descend.The bonding strength of the sample by sand blasting is obviously higher than that by shot blasting and increases from 9.32 MPa to 19.53 MPa.展开更多
基金the Education Fund of Zhejiang Province(No.20030758)
文摘Influence of fabric geometrical parameters,including the number of filling yarns per 10 cm,yarn twist and fiber type,on bonding of the fabric reinforced cement composites is studied by fabric pull-out test and SEM microstructure analysis.The results show that the bonding strength increase with the increase of the number of filling yarns per 10 cm in the range of this study.But the influence of fabric count on the interfacial bonding is dual and there is a critical value.The twist of yarns has a little effect on the bonding strength and interfacial bonding behaves of nylon fabric reinforced cement composites.There is an optimum twist range.Within this range,the bonding strength increase slowly with the increase of yarn twist.Beyond this range,it is versus.The bonding strength is strongly affected by the fabric character.The bonding between the nylon fiber fabric and cement is good;that of between glass fiber fabric and cement is moderate and that of between the carbon fiber fabric and cement is poor.
基金Project(51101109)supported by the National Natural Science Foundation of China
文摘In order to improve the bonding strength between piston alloys and cast iron ring of aluminum piston with reinforced cast iron ring,the different methods of the surface treatments(shot blasting and sand blasting) to the cast iron ring are experimented.The optical micrograph shows that an intermetallic layer and a ligulate shaped structure are formed between piston alloys and cast iron base ring.After sand blasting treatment,the ring surface is non-metal shiny,matte-like and has no obvious pits.The intermetallic layer thickness formed between piston alloys and cast iron is thinner and more equally distributed after sand blasting to the ring.The content of the graphite distributed the interfacial zone after the shot blasting treatment is little.With the increase of time by sand blasting,the hardness starts to slightly descend.The bonding strength of the sample by sand blasting is obviously higher than that by shot blasting and increases from 9.32 MPa to 19.53 MPa.
