SiC晶须增韧的钨尾矿微晶玻璃

在钨尾矿微晶玻璃基体中加入２５％（体积分数）的ＳｉＣｗ，可显著提高其断裂韧性和抗弯强度。观察了复合材料的形状记忆效应（ＳＭＥ）。通过微观分析，讨论了ＳｉＣ晶须增韧补强的原因。     

BSTUDY ON Ni_(25)Ti_(50)Cu_(25) SHAPE MEMORY PARTICLE/Al MATRIX COMPOSITE

ＳＴＵＤＹＯＮＮｉ_（２５）Ｔｉ_（５０）Ｃｕ_（２５）ＳＨＡＰＥＭＥＭＯＲＹＰＡＲＴＩＣＬＥ／ＡｌＭＡＴＲＩＸＣＯＭＰＯＳＩＴＥＬ．Ｓ．Ｃｕｉ；Ｍ．Ｑｉ；Ｐ．Ｓｈｉ；Ｆ．Ｘ．ＣｈｅｎａｎｄＤ．Ｚ．Ｙａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＥ?..     

SiO2-Al2O3-CaO-Fe2O3系微晶玻璃的晶化过程

利用差热分析（ＤＴＡ）、红外吸收光谱（ＩＲ）、Ｘ射线衍射（ＸＲＤ）和扫描电镜（ＳＥＭ）等手段研究了ＳｉＯ２－Ａｌ２Ｏ３－ＣａＯ－Ｆｅ２Ｏ３系微晶玻璃晶化过程及其结晶化过程及其结晶动力学。结果表明：ＳｉＯ２－Ａｌ２Ｏ３－ＣａＯ－Ｆｅ２Ｏ３系微晶玻璃晶化过程中,初晶相是钙铁透辉石,钙铝黄长石是中间过渡相且随晶化温度的提高而消失,最终晶相只有钙铁透辉石;晶体生长指数为２．９,属三维生长。玻璃网络中主要有     

PHASE DIAGRAMS AND σ- PHASE PRECIPITATION IN SOME STAINLESS STEELS

ＰＨＡＳＥＤＩＡＧＲＡＭＳＡＮＤσ－ＰＨＡＳＥＰＲＥＣＩＰＩＴＡＴＩＯＮＩＮＳＯＭＥＳＴＡＩＮＬＥＳＳＳＴＥＥＬＳ￥Ｐａｎ，Ｙｏｎｇ；Ｑｉｕ，Ｃａｉａｎ（ＸｉａｎｇｔａｎＵｎｉｖｅｒｓｉｔｙ，Ｘｉａｎｇｔａｎ４１１１０５）Ａｂｓｔｒａｃｔ：Ｐｈａｓｅ...     

冶金固体废弃物制备新型玻璃材料的研究进展

综述了国内以金属尾矿和冶金废渣为原料制备泡沫玻璃、微晶玻璃及泡沫微晶玻璃的研究进展。金属尾矿中，铁尾矿因SiO₂含量高且储量巨大，在制备新型玻璃领域得到了广泛研究；冶金废渣中，高炉渣、钢渣和镍渣研究较多，这3类废渣储量巨大且含有发泡剂(如S)和晶核剂(如TiO₂)成分，有利于制备新型玻璃。对冶金固体废弃物制备新型玻璃的前景进行了展望，冶金固体废弃物在制备新型玻璃时有着极大的原料优势，且所制备的新型玻璃产品也具有一些特殊性能(如钨尾矿微晶玻璃的形状记忆效应、铁尾矿微晶玻璃的吸波性能等),可拓宽其应用范围，同时解决冶金固废处理问题，实现资源循环利用。     

Thermal decomposition of ammonium molybdate mixture

ＴＨＥＲＭＡＬＤＥＣＯＭＰＯＳＩＴＩＯＮＯＦＡＭＭＯＮＩＵＭＭＯＬＹＢＤＡＴＥＭＩＸＴＵＲＥＹｉｎ，Ｚｈｏｕｌａｎ；Ｌｉ，Ｘｉｎｈａｉ；Ｚｈａｏ，Ｑｉｎｓｈｅｎｇ；Ｃｈｅｎ，Ｓｈａｏｙｉ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎ－ｆｅｒｒｏｕｓＭｅｔａｌｌｕｒ...     

MORPHOLOGY AND ORIENTATION CHARACTERISTICS OF DIRECTIONALLY SOLIDIFIED α(A1)-Mg_2Si EUTECTIC

ＭＯＲＰＨＯＬＯＧＹＡＮＤＯＲＩＥＮＴＡＴＩＯＮＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＤＩＲＥＣＴＩＯＮＡＬＬＹＳＯＬＩＤＩＦＩＥＤα（Ａ１）－Ｍｇ_２ＳｉＥＵＴＥＣＴＩＣ￥Ｓ．Ｐ．Ｌｉ；Ｓ．Ｘ．Ｚｈａｏ；Ｍ．ＸＰａｎ；Ｄ．Ｑ．Ｚｈａｏ；ａｎｄＸ．Ｃ．Ｃ?..     

萃取碳复型上碳化物化学式的确定

提出由萃取碳复型上沉淀相的ＥＤＡＸ或ＷＤＸ测量结果，确定含碳以外其它间隙原子的碳化物中的碳含量及其化学式的方法。应用此方法，由ＥＤＡＸ测量结果确定了两种不锈钢中Ｍ（Ｃ，Ｓ），Ｍ２ＣＳ，ε－Ｍ３（Ｃ，Ｓ）和Ｍ２３（Ｃ，Ｓ）６的化学式。     

AN APPROACH FOR CONTROLLING OSCILLATION IN DYNAMIC STRESS-STRAIN MEASUREMENT

ＡＮＡＰＰＲＯＡＣＨＦＯＲＣＯＮＴＲＯＬＬＩＮＧＯＳＣＩＬＬＡＴＩＯＮＩＮＤＹＮＡＭＩＣＳＴＲＥＳＳ－ＳＴＲＡＩＮＭＥＡＳＵＲＥＭＥＮＴＬｉｕＤｅｓｈｕｎ（ＸｉａｎｇｔａｎＭｉｎｉｎｇＩｎｓｔｉｔｕｔｅ，Ｘｉａｎｇｔａｎ４１１２０１ＬｉＸｉｂｉｎｇ；...     

EFFECT OF ANNEALING TEMPERATURE ON TEXTURE OF COLD－ROLLED Ni_（47）Ti_（44）Nb_9 SHEET

ＥＦＦＥＣＴＯＦＡＮＮＥＡＬＩＮＧＴＥＭＰＥＲＡＴＵＲＥＯＮＴＥＸＴＵＲＥＯＦＣＯＬＤ－ＲＯＬＬＥＤＮｉ_（４７）Ｔｉ_（４４）Ｎｂ_９ＳＨＥＥＴＹａｎｇ；ＧｕａｎｊｕｎＸｉｅ；ＬｉｙｉｎｇＨｕ；ＷｅｎｙｉｎｇＤｅｎｇ；ＪｕＨａｏ；Ｓｈｉｍｉｎｇ（Ｎｏ?..     

Effect of chemical component on shape memory effect of Fe-Mn-Si-Ni-C-RE shape memory alloy

Effect of chemical component on shape memory effect (SME) of Fe-Mn-Si-Ni-C-RE shape memory alloys was studied by bent measurement, thermal cycle training, SEM etc. Results of study indicate that the alloys with high Mn content (25%) appeare better SME, especially in lower strain. SME improves evidently when Si is higher content, especially it's range from 3% up to 4%. But brittleness of Fe-Mn-Si-Ni-C-RE alloy increases by increasing the Si content. SME of the alloy is weakening gradually as carbon content increases under small strain (3%). But in the condition of large strain (above 6%), SME of the alloy whose carbon content ranges from 0.1 % to 0.12% shows small decreasing range, especially of alloy with the addition of compound RE.     

添加Cr对Ti-Ni形状记忆合金相变和低温形变特性的影响

用示差扫描量热仪和拉伸试验研究了添加Cr对形变退火态Ti-Ni形状记忆合金相变和低温形变特性的影响。结果表明,添加微量Cr后,Ti-Ni合金的R、马氏体(M)相变温度θR和θM大幅度降低,M相变热滞?θM增加,应力-应变曲线的平台应力σM显著提高,超弹性(SE)改善,塑性变差。添加微量Cr后,Ti-Ni合金的低温SE特性大幅改善。室温下,Ti-50.8Ni合金呈现形状记忆效应(SME)+SE,而Ti-50.8Ni-0.3Cr合金则呈现SE。退火温度也显著影响Ti-Ni合金的低温形变特性。在10℃变形时,400～500℃退火态Ti-50.8Ni合金呈现SME,550～650℃退火态Ti-50.8Ni合金呈现SME+SE,而400～650℃退火态Ti-50.8Ni-0.3Cr合金则持续呈现SE。     

Ti-50.8Ni合金的相变、形状记忆和超弹性特性

用热重分析仪、X射线衍射仪、光学显微镜、示差扫描热分析仪和拉伸试验研究了Ti-50.8Ni形状记忆合金的组织、相变、形状记忆效应(SME)和超弹性(SE)特性。结果表明,Ti-50.8Ni合金在600℃以下退火后组织呈纤维状,在该温度以上退火后组织呈等轴状。加热温度超过600℃后合金氧化加剧。随退火温度Ta升高,合金冷却/加热过程中的相变类型由A→R→M/M→R→A型向A→R→M/M→A型再向A→R/R→A型转变(A—奥氏体,R—R相,M—马氏体),合金的M相变温度升高,R相变温度降低,M相变热滞降低,合金室温特性由SME+SE向SE转变。形变温度Td<20℃时,合金弹簧呈SME+SE,Td>30℃时,合金弹簧呈SE。随Td升高,合金弹簧的应力诱发M应力升高。     

Co对Ti-Ni形状记忆合金相变和形变特性的影响

用热重分析仪、X射线衍射仪、示差扫描量热仪及拉伸试验研究了Co对Ti-49.8Ni(at%,下同)形状记忆合金相变和形变特性的影响。结果表明,中温退火态Ti-49.8Ni合金冷却/加热时的相变类型为A→R→M/M→A(A—母相,R—R相,M—马氏体相);随退火温度升高,该合金的马氏体相变温度升高,R相变温度先升高后降低;该合金室温相组成为马氏体,具有形状记忆效应(SME)。用1%Co置换等量Ti后所得Ti-49.8Ni-1Co合金冷却/加热时的相变类型为A→R→M/M→R→A,相变温度低,室温组成相为母相A,具有超弹性(SE)特性。退火温度低于600℃时,Ti-Ni基合金的SME和SE特性良好,退火温度超过600℃后,合金氧化加剧,SME和SE特性变差,塑性显著提高。     

Influence of process factors on shape memory effect of CuZnAl alloys

1Introduction CuZnAl shape memory alloy(SMA),characterized by low cost and high processing performance,has been studied comprehensively and has developed rapidly in recent years.Since the fundamental problems of large grain and martensitic stabilization w…     

THE STRESS-STRAIN-RESISTANCE RELATIONS IN Fe-Mn-Si ALLOYS

1. IntroductionThe strain sensitivity coefficients of resistance, K, have a value of about 2.0 in elasticregion for most alloys, such as constantan (a Cu-Ni alloy), karma (a Ni--Cr based alloy)and Fe-Cr-Al alloy, except Pt-W alloys. The K values are also about 2.0 in plastic regionfor the most alloys. For the ac--Fe--Mn-Al-Cr alloy it is also about 2.0 during plastic transformation, however, it becomes as high as 4.0--4.8 due to the antiferromagnetic transitionbelow the N6el temperature,…     

TiNi合金的形状记忆效应及其工程应用研究进展

对TiNi合金形状记忆效应（SME）的特性、影响因素和工程应用的研究现状进行了综述。着重介绍了TiNi合金SME的特点及其工程意义,合金成分、热处理和加工工艺对SME的影响,以及TiNi合金在驱动器、连接器和紧固件制作,结构变形和开裂控制,结构振动主动控制等方面的应用,并就目前研究的不足以及该研究领域的发展方向提出了一些看法。     

SHAPE MEMORY EFFECT OF POLYCRYSTALLINE Fe-Mn-Si ALLOYS

The influence of quenching temperature on the shape memory effect(SME)of theFe-Mn-Si polycrystalline alloys and their martensitic transformation temperature have beenstudied.The SME of the hot-rolled specimen may be remarkably enhanced by selectingquenching temperature of 600—800℃.It has been shown that SME is influenced not only bythe distribution of ε-phase morphology but also by its pre-existence.     

EFFECT OF DYNAMIC RECRYSTALLIZATION ON SHAPE MEMORY EFFECT IN Fe－Mn－Si BASED ALLOYS

ＥＦＦＥＣＴＯＦＤＹＮＡＭＩＣＲＥＣＲＹＳＴＡＬＬＩＺＡＴＩＯＮＯＮＳＨＡＰＥＭＥＭＯＲＹＥＦＦＥＣＴＩＮＦｅ－Ｍｎ－ＳｉＢＡＳＥＤＡＬＬＯＹＳ￥Ｌ．Ｊ．Ｒｏｎｇ;Ｙ．Ｙ．ＬｉａｎｄＣ．Ｘ．Ｓｈｉ（ＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌＲｅｓｅａｒｃｈ,Ｃ...     

Role of thermal martensite in shape memory effect of CoAl and CoNi alloys

To address the role of the HCP martensite in CoAl and CoNi shape memory alloys, the relationship between the shape memory effect (SME) and the content of the thermal and stress-induced HCP martensite was investigated in the solution-treated CoAl and CoNi alloys. In-situ optical observations were employed to investigate the contents of thermal HCP martensite before and after deep cooling and its influence on the stress-induced HCP martensite transformation and SME. The results show that the SME in both the CoAl and the CoNi alloys results from the stress-induced HCP martensite. The role of the thermal HCP martensite in both of them is the strengthening of the matrix. The much higher yield strength in the solution-treated CoAl alloy due to solution strengthening of Al is responsible for its better SME compared with the CoNi alloy.